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Human Body System Lesson Presentation (PowerPoint)

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									     Human Body System
       Chapter 3
Lesson Presentation PowerPoint
         By Chad Clark



                                 1
     Human Body System
         Chapter 3
       Section 1
Lesson Presentation PowerPoint
         By Chad Clark



                                 2
            Terms To Learn:
Digestive system      Pancreas

Esophagus             Liver

Stomach               Gallbladder

Small intestine       Large intestine
                                        3
           What You’ll Do:
• Describe the parts and functions of the
  digestive system.

• Compare mechanical digestion with
  chemical digestion.

• Describe some disorders of the digestive
  system.
                                             4
    Using Prior Knowledge
1   How does your circulatory system obtain the
      nutrients that it brings to your cells?
    Raise your hand and tell us what you think!


2   Describe as best you can the process that
      turns food into nutrients that cells can use?

    Raise your hand and tell us what you think!

                                                      5
       The Digestive System
           Concept Map
On the note cards provided you should
       see the following terms:
    Digestive System Pancreas
    Large Intestine    Liver
    Stomach            Gallbladder
    Small Intestine    Esophagus
 Once you have checked your cards,
 please wait for further instructions
          from your teacher.          6
Concept Map Example
        Cars
Dodge Grand Caravan
    Ford F-350
   Toyota Camry
      Trucks
       Vans
     Vehicles         7
   Concept Map Example

         Vehicles

Trucks    Cars       Vans

 Ford    Toyota      Dodge
F-350    Camry       Grand
                    Caravan
                              8
      The Digestive System
          Concept Map
In the space provided, record how
  your partner and you organized
      the words on your desk.
You can use arrows to better show
    connections between words.
   Also, use the whole space with
     boxes around your words.
                                    9
              Demonstration
How much saliva do you think you produce in one day?
        This is about how much saliva
        (spit) you produce in one day!


                1.2 liters or a
                  little more
                 than 5 cups!

                     This is an
                     empty 2-
                     liter bottle

                 How much saliva do you think you
                 drool on your pillow at night?  10
     Discussion!
     Digestive System

Raise your hand if
 you can tell us a
   definition of
 digestive system
                        11
      The Digestive System
           Vocabulary
       Digestive System:
            ???????
Please follow along as the first
 paragraph of page 54 is being
    read to you. In the space
    provided, write down the
     definition of “Digestive
             System”           12
              Vocabulary
Digestive System:
 The digestive system is a collection of
 organs that break down food so that it can
 be used by the body; the organs in this
 system include the stomach, the pancreas,
 the liver, the gallbladder, the small
 intestine, and the large intestine

                                              13
      Is that a Fact!?!
The average human eats about 1000
     pounds of food every year!
Digestive System at a Glance

   Please follow along as “Digestive
  System at a Glance” section of your
 book on page 54 is being read to you.
Try to come up with 3 important facts
           about this section.
Raise your hand and tell us what
   you think in your own words!


                                     15
Digestive System at a Glance
   Summarize in 3 complete
 sentences the most important
 facts from the section in your
  textbook entitled “Digestive
System at a Glance” on page 54.
Write your answers in the space
 provided in your packet, listed
 under “Digestive System at a
            Glance.”               16
  The Journey of a Sandwich
            Vocabulary

             ???????
Please follow along as the section
    entitled, “The Journey of a
Sandwich” on page 55 is read to you
 and develop your own definition of
      Mechanical digestion
       Chemical digestion
             Enzymes
                                      17
   The Journey of a Sandwich
          Vocabulary
 Reread “The Journey of a Sandwich”
 section on page 55 of your textbook and
 write your own detailed definition for the
 following words:

Mechanical digestion: ??????
Chemical digestion: ??????
Enzymes: ??????

                                              18
                    Saliva Quick Lab
                 “Break it Up”
Question:
How do peppermint candy pieces react differently if left
  whole or crushed when placed in a cup of water?
Background Knowledge:
What do you already know about saliva?
Write it in your packet and then share your
 answer with your neighbor!
Materials:
2 clear 12 ounce plastic cups, 2 cups tap water, 1 whole
   peppermint candy, 1 crushed peppermint candy, 1 paper
                                                           19
   towel, 1 hammer
           Procedures:
1. Drop one piece of candy into a
   clear plastic cup of water.
2. Wrap an identical candy with a
   paper towel and crush it with a
   hammer.
3. Drop the crushed candy into a
   second clear cup of water.
4. The next day, examine both
   cups and record observations.     20
Drawing of both cups after adding water and candy




 Whole Candy                 Crushed Candy

 Drawing of both cups after waiting 24 hours




Whole Candy                  Crushed Candy
                                                    21
           Observations:
1.What did you observe happening?
2.After 24 hours, what was different
  about the two candies?
3.What part of digestion is represented
  by breaking the hard candy?
4.How does chewing your food help
  the process of digestion?               22
Digestion Begins in the Mouth

    Please follow along as
   “Digestion Begins in the
  Mouth” section of your book
  on page 56 is being read to
              you.



                                23
                 Saliva Quick Lab
         “Saltines and Saliva”
Question:
How does an unsalted soda cracker react to the
 saliva in your mouth?
Background Knowledge:
What do you already know about saliva?
Write it in your packet and then share
 your answer with your neighbor!
Materials:
Two soda crackers                                24
            Procedures:
1. Place the unsalted soda crackers
   into your mouth and begin chewing,
   DO NOT SWALLOW!!!
2. For the next two minutes, make
   mental observations about what you
   feel and taste in your mouth.
3. After 2 minutes of chewing and
   making observations, swallow and
   answer the following discussion
   questions.                         25
               Saliva Quick Lab
        “Saltines and Saliva”
Discussion Questions:
1. What physical changes occurred to the
   soda cracker?
2. What chemical changes occurred to the
   soda cracker?
3. What caused the physical changes to the
   soda cracker?
4. What caused the chemical changes to the
   soda crackers
5. Did you notice a taste change in the soda
   crackers?                                 26
               Saliva Quick Lab
         “Saltines and Saliva”
Background Knowledge:
•   An amylase is an enzyme that breaks
    starch down into sugar. Amylase is
    present in human saliva, where it begins
    the chemical process of digestion.
•   Foods that contain much starch but little
    sugar, such as rice and potato, taste
    slightly sweet as they are chewed because
    amylase turns some of their starch into
    sugar in the mouth.                       27
    Through the Teeth
    Summarize in 3 complete
  sentences the most important
  facts from the section in your
 textbook entitled “Through the
        Teeth” on page 56.
Write your answers in the space
  provided in your packet, listed
   under “Through the Teeth.”
                                    28
   And Over the Gums
   Summarize in 3 complete
 sentences the most important
 facts from the section in your
textbook entitled “And Over the
       Gums” on page 56.
Write your answers in the space
 provided in your packet, listed
  under “And Over the Gums.”
                               29
    Look Out Stomach,
      Here It Comes!
   Summarize in 3 complete
 sentences the most important
 facts from the section in your
  textbook entitled “Look Out
  Stomach, Here It Comes” on
            page 56.
Write your answers in the space
 provided in your packet, listed
under “Look Out Stomach, Here
           It Comes!”              30
    Through the Teeth
 In this section of your packet,
  carefully draw and fill in the
  labels for the figure of the
 tooth (Figure 3) found on page
56 of your textbook. Remember
 to use good detail and color if
      you want full credit.
                                   31
        Is that a Fact!?!
Many students mistakenly assume that
teeth are made of bone. Actually, teeth
is made of enamel and dentin. Enamel
   and dentin are similar to bone in
appearance and calcium content. Bone
  contains blood vessels, but enamel
           and dentin do not!
         Vocabulary
            Peristalsis:
Peristalsis is the rhythmic muscle
    contraction in the digestive
                 tract.



                                     33
         Is that a Fact!?!
The Esophagus is about 10 inches long and
         about 1 inch in diameter.
            SCIENCE HUMOR!
A man walks into a doctor’s office with
    a stalk of celery in one ear and a
   carrot in the other. The man says,
  “Doc, I’m just not feeling well these
   days.” The doctor replies, “I think
    that’s because you haven’t been
              eating right!”
          Demonstration
Do you think that peristalsis is voluntary or
        involuntary muscle action?
        Mouth               Esophagus: A long,
       Throat               straight tube that
                            connects the throat
                            to the stomach
         Esophagus
            This action is called peristalsis, similar
            muscle contractions are also happening
            in the stomach.
                      Stomach
                       Sphincter muscle
                    To the small intestine in the form
                    of “chyme” created from both
                    mechanical and chemical digestion.
                                                      35
Mechanical Digestion vs. Chemical Digestion

           Chemical digestion occurs both in the
            Mechanical the stomach as both in the
           mouth and indigestion occurswell as the
            mouth and in the stomach. stomach, and
           small intestine. Your saliva,Mechanical
            digestion physically crushes, grinds, and
           small intestine all contain special enzymes
            squeezes your break down the food you
           that chemicallyfood into very small pieces.
           eat into even smaller pieces.




                                        Small Intestine


                                                         36
The Stomach’s Harsh Environment
             Vocabulary

               ???????
 Please follow along as the section
   entitled, “The Stomach’s Harsh
 Environment” on page 57 is read to
 you and develop your own definition
                  of
              Stomach

                                       37
The Stomach’s Harsh Environment
            Vocabulary
  Reread “The Stomach’s Harsh
 Environment” section on page 57 of
 your textbook and write your own
 detailed definition for the following
 word:


Stomach: ??????

                                         38
              Vocabulary
Stomach:
  A muscular, baglike organ of the digestive
  tract; attached to the lower end of the
  esophagus




                                               39
         Is that a Fact!?!
The stomach is between 8 and 12 inches
    in length and about 6 inches at its
   widest point. An adult stomach can
  hold about 1 quart of food or liquid!
 Start-Up Activity: Changing Foods
• Question:
• How does food in your stomach react to the
  movements of your stomach?
• Background Knowledge:
• What do you already know about the stomach?
• Write it in your packet and then
  share your answer with your
  neighbor!
• Materials:
• 1 quart-sized clear plastic bag, 1 cup flour, ½ cup
  water, ½ cup oil, 3 drops food coloring, 1 tbsp of
  corn
                                                    41
                Procedures:
1.   Add 1 cup of flour and ½ cup of water to
     a resealable plastic bag. Mix ½ cup of
     vegetable oil, food coloring, and corn
     with the flour and water.
2.   Seal the plastic bag, shake it until the
     flour, water, food coloring, corn, and oil
     are well mixed.
3.   Remove as much air as possible, and
     reseal the bag carefully.
4.   Squeeze the bag with your hands for
     five minutes (Be sure to keep the bag
     sealed!)
5.   Record your observations.                  42
             Observations:
1.What did you observe happening?
2.Describe the mixture before and after you
  kneaded the bag.
3.How might the changes you saw in the
  mixture relate to what happens to food
  you eat?
4.Do you think this is a good model of how
  your stomach works? Why or why not?         43
Start-Up Activity: Changing Foods
Background Knowledge:
 In this demonstration, the oil
 represents fats consumed in a meal. In
 the human body, these fats separate
 from the food mixture, and bile breaks
 them down into smaller particles. The
 stomach is a muscular baglike organ
 that is involved in the physical and
 chemical digestion of a meal…
                                      44
Start-Up Activity: Changing Foods
Background Knowledge:
 By squeezing the bag, you were
 modeling the muscular
 contractions of the stomach. This
 model does not show the effects of
 the chemical digestion that occurs
 in the stomach.
                                    45
  Start-Up Activity: Changing Foods2
• Question:
• How does food in your stomach react to
  the acids and enzymes in your stomach?
• Background Knowledge:
• What do you already know about the
  stomach?
• Write it in your packet and then
  share your answer with your
  neighbor!
                                           46
  Start-Up Activity: Changing Foods2
Background Knowledge:
 The stomach moves the food around while
 digestive juices – acids and enzymes – are
 added to begin protein digestion. Meat
 tenderizing powders from the store can
 demonstrate how enzymes in your stomach
 help to break down protein in the meals
 you eat. You commonly can get two types
 of meat tenderizer at grocery stores. One
 type contains an enzyme called papain,
 from papaya. Another type has an enzyme
 called bromelain, from pineapple. In this
 lab, you will test the effects of these two
 different types of meat tenderizers on beef 47
 stew meat.
 Start-Up Activity: Changing Foods2
Materials:
• 3 test-tubes, test-tube rack, marker,
  masking tape, 25 mL graduated
  cylinder, eyedropper, ¼ tsp measuring
  spoon, very dilute hydrochloric acid,
  meat tenderizer containing bromelain,
  meat tenderizer containing papain,
  3 – one cm cubes of beef stew meat,
  and protective gloves
                                      48
            Procedures:
1. Ask A Question: Which meat
   tenderizer will work faster? Which
   will make the meat more tender?
   Will there be a color change in the
   meat or in the water? What might
   these changes, if any, indicate?
   Determine what you will look for as
   you plan your experiment.

                                         49
            Procedures:
2. Form A Hypothesis: Examine the
    list of ingredients on the labels of
    each of the meat tenderizers. Form
    a hypothesis about which
    tenderizer will make the beef more
    tender.
Caution: DO NOT TASTE ANY OF
    THE MATERIALS IN THIS
    ACTIVITY!
                                       50
            Procedures:
3. Conduct An Experiment:
   Variables are materials in the
   experiment that change.
   Constants are materials that
   remain the same for all of the test-
   tubes. In this experiment which
   materials are considered the
   “variable” and which can be
   considered “constants”?
                                      51
           Procedures:
4. Conducting the Experiment:
  Use the data table to record
  your observations and results.
  Write the name of each meat
  tenderizer in the appropriate
  box in the table.


                                   52
            Procedures:
4. Label two of the test tubes with
    the name of the tenderizer being
    investigated. Label the third test
    tube “control.” What will the
    contents of this tube?
5. Pour 20 mL of water into each test
    tube.


                                         53
            Procedures:
6. With the eyedropper, add four
   drops of very dilute hydrochloric
   acid to each test tube (your
   teacher will do this part).
CAUTION: HYDROCHLORIC ACID
   CAN BURN YOUR SKIN. IF ANY
   TOUCHES YOUR SKIN, RINSE
   THE AREA WITH RUNNING
   WATER AND TELL YOUR
   TEACHER IMMEDIATELY!!             54
             Procedures:
7. Using the measuring spoon, add ¼ tsp
   of a meat tenderizer to each
   correspondingly labeled test tube.
8. Add one piece of beef to each test
   tube.
9. Record your observations of each test
   tube immediately, after 5 minutes,
   after 15 minutes, after 30 minutes,
   and again after 24 hours.
10. Answer the Analysis and Review
    Questions in your packet.
                                           55
         Analysis Questions:
1.Did you notice any differences in the beef
  in the three test tubes right away?
2.At what time interval did you notice a
  significant difference in the appearance of
  the test tubes?
3.Did one meat tenderizer perform better
  than the other? Explain how you
  determined which tenderizer was most
  efficient.                                    56
       Conclusion Questions:
1.Was your hypothesis supported? Explain.
2.Many stinging animals have venom
  composed of proteins. Explain how
  applying meat tenderizer to the wound
  helps relieve the pain of such a sting.




                                            57
            Section Review
1.What is the difference between mechanical
  digestion and chemical digestion?
  Raise your hand and tell us what you wrote
               on your paper!
2. Give two reasons why the following
  statement is true: Digestion begins in the
  mouth.
 Raise your hand and tell us what you wrote
              on your paper!
                                               58
           Section Review
1.What is the difference between mechanical
  digestion and chemical digestion?
   Mechanical digestion usually involves
the crushing and mashing of whole bites of
food. Mechanical digestion prepares the
food for chemical digestion. Chemical
digestion is the process of changing large
molecules of food into smaller molecules
that can be absorbed into the bloodstream.    59
            Section Review
2. Give two reasons why the following
  statement is true: Digestion begins in the
  mouth.
 Mechanical or physical digestion begins
 in the mouth. (1) As you chew, you are
 physically digesting your food. (2) Saliva
 contains an enzyme that begins the
 chemical digestion of carbohydrates.
                                               60
The Gigantic Small Intestine

 Please follow along as “The Gigantic
    Small Intestine” section of your
 book on page 58 is being read to you.
Try to come up with 4 important facts
           about this section.
Raise your hand and tell us what
   you think in your own words!


                                     61
   Graphic Organization:
Reading Strategies that Work!



          The Gigantic
         Small Intestine




                                62
    The Gigantic Small Intestine
            Vocabulary
  Reread “The Gigantic Small
 Intestine” section on page 58 of your
 textbook and write your own detailed
 definition for the following words:


Small Intestine: ??????

                                     63
              Vocabulary
Small Intestine:
 The small intestine is a muscular tube
 about 6 meters long; the site of most
 chemical digestion.




                                          64
                    Quick Lab
    “Villi of the Small Intestine”
Question:
How do the “villi” in the small intestine work?
Background Knowledge:
What do you already know about the small intestine?
Write it in your packet and then share your
 answer with your neighbor!
Materials:
4 cups, water, graduated cylinder
                                                  65
           Procedures:
1. Fill each cup to the line with
   water.
2. Fold one paper towel in half.
3. Carefully dip the folded towel
   into the water, 1 inch deep for
   10 seconds and remove it from
   the water.
                                     66
             Procedures:
4. Carefully pour the remaining water
    into the graduated cylinder.
    Determine the volume of water left
    in the cup and record your results
    in your packet.
5. Repeat steps 2, 3, and 4 with two,
    three, and four pieces of paper
    towel folded together.
6. Clean up your area and answer the
    discussion questions in your packet. 67
              Quick Lab
   “Villi of the Small Intestine”
Discussion Questions:
1. Which paper towel had the
   largest surface area?
2. Which cup had the highest
   volume of water left?
3. How do the villi of the small
   intestine aid in absorbtion?
                                    68
    Human Body System
   Exploring the Intestines:
Casing the System
   Experiment
Lesson Presentation PowerPoint
         By Chad Clark


                                 69
             Exploring the Intestines:
          “Casing the System”
Question:
How does the food we eat nourish all parts of our
 bodies?
Background Knowledge:
What do you already know about the intestines?
Write it in your packet and then share
 your answer with your neighbor!
Materials:
Sausage casing, string, water, corn syrup, food
  coloring, container, and rubber gloves            70
   Background Knowledge:

• Please follow along as the Background
  Information Page is being read to you.
         Exploring the Intestines:
       “Casing the System”
            Hypothesis:
What do you think will happen inside
  the container? Discuss what you
      think will happen almost
   immediately to the casing, the
 water, and the corn syrup. Discuss
   how you think the casing might
  change, the water might change,
  and the corn syrup might change
          after 24 hours.
                                     72
           Observations:

  Actions         Sausage       What did
 Taken #1:      Casing in the   you notice
                 Container      happen in
                  Drawing:       the tub?
Placed a
water filled
sausage
casing into a
container of
corn syrup.
                                             73
           Observations:

  Actions          Sausage       What did
 Taken #2:       Casing in the   you notice
                  Container      happen in
                   Drawing:       the tub?
Placed a water
filled sausage
casing into a
container of
corn syrup
for 24 hours.

                                              74
           Analysis of Results:
Action #1: Placed a water filled sausage
 casing into a container of corn syrup.

1. What actually happened in the tub when
   you placed the water filled sausage casing
   into the container of corn syrup? (write
   down everything you observed)

2. Was this the same as your hypothesis or
   different? Why?

3. Why do you think this happened to the
   casing, water, and corn syrup?            75
              Analysis of Results:
Action #2: Placed a water filled sausage
  casing into a container of corn syrup for 24
  hours.
1.What actually happened in the tub when
  you placed the water filled sausage casing
  into the container of corn syrup and
  waited 24 hours? (write down everything
  you observed)

2.Was this the same as your hypothesis or
  different? Why?

3.Why do you think this happened to the
  casing, water, and corn syrup?            76
        Discussion Questions:
1. What happened to the liquid in the casing?
2. Why do you think this happened?
3. How is this simulation like digestion in
   our small intestines?
4.Why do our intestines have folds
   and villi?
5. How do the food nutrients get to all
   of our body cells?
4. What other bodily processes do you
   think use osmosis?
5. How is the wrapper from the drinking
       straw like your small intestine?       77
FINDING ADDITIONAL RESEARCH:

What additional questions would you
like answered about the intestines?
_______________________________________
_______________________________________
_______________________________________
_______________________________________
_______________________________________




                                      78
         The Pancreas
Please follow along as “The Pancreas”
   section of your book on page 58 is
           being read to you.
Try to come up with 4 important facts
           about this section.
Raise your hand and tell us what
   you think in your own words!


                                        79
   Graphic Organization:
Reading Strategies that Work!



          The Pancreas




                                80
           The Pancreas
            Vocabulary
  Reread “The Pancreas” section on
 page 58 of your textbook and write
 your own detailed definition for the
 following word:


Pancreas: ??????

                                        81
             Vocabulary
Pancreas:
  The pancreas is an organ between the
  stomach and the small intestine that
  produces enzymes for chemical digestion




                                            82
The Liver and Gallbladder
 Please follow along as “The Liver and
  Gallbladder” section of your book on
      page 59 is being read to you.
Try to come up with 4 important facts
           about this section.
Raise your hand and tell us what
   you think in your own words!


                                         83
           Liver Function Demonstration
 “The Body’s Chemical Factory”
Question:
How does the liver help the body?
Background Knowledge:
What do you already know about the liver?
Write it in your packet and then share
 your answer with your neighbor!
Materials:
Coffee filters, orange juice, coffee maker drain pan
                                                       84
           Procedures:
1. Watch the teacher
   demonstration
2. Answer the discussion
   questions in your packet!




                               85
       Liver Function Demonstration
 “The Body’s Chemical Factory”
Discussion Questions:
1. What happened during the
   experiment?
2. What stays in the filter?
3. What slips through the filter?

                                      86
           Liver Function Demonstration
    “The Body’s Chemical Factory”
Background Knowledge:
•   The liver acts as a filter for the body, and
    also the spleen helps filter foreign
    substances from the blood. The spleen is a
    small gland-like organ located near the
    stomach, which stores blood and helps filter
    foreign substances from the blood. The
    liver is an important organ that acts like a
    warehouse for your body’s nutrients…
                                              87
         Liver Function Demonstration
 “The Body’s Chemical Factory”
Background Knowledge:
•   The liver helps your body break down or
    change carbohydrates, fats, and proteins so
    that your can use them. It also removes
    harmful substances from your blood. Your
    liver filters old blood cells and processes
    most of the nutrients that are absorbed from
    the small intestine. When a red blood cell
    wears out or is damaged, it is broken down
                                                88
    in the liver and the spleen.
   Graphic Organization:
Reading Strategies that Work!



         The Liver and
          Gallbladder




                                89
     The Liver and Gallbladder
              Vocabulary
 Reread “The Liver and Gallbladder”
 section on page 59 of your textbook and
 write your own detailed definition for the
 following words:


Liver: ??????
Gallbladder: ???????

                                              90
               Vocabulary
Liver:
  The liver is a large, reddish organ that
  produces bile and stores nutrients




                                             91
              Vocabulary
Gallbladder:
 The gallbladder is a small, baglike organ
 that stores bile




                                             92
           Liver Function Demonstration
               “Fat and Bile”
                      (Liver Let Live)


Question:
How does bile effect the fat from digested foods?
Background Knowledge:
What do you already know about bile?
Write it in your packet and then share
 your answer with your neighbor!
Materials:
Food coloring, jar with lid, water, vegetable oil,
  liquid detergent                                   93
           Procedures:
1. Watch the teacher
   demonstration
2. Answer the discussion
   questions in your packet!




                               94
        Liver Function Demonstration
           “Fat and Bile”
                 (Liver Let Live)


Discussion Questions:
1. After the water, food coloring, and
   oil mixture was vigorously shaken,
   describe what happened in the jar.
2. After the liquid detergent was added
   to the jar and, again, vigorously
   shaken, describe what happened in
   the jar.
                                          95
          Liver Function Demonstration
             “Fat and Bile”
                   (Liver Let Live)


Background Knowledge:
•   As was demonstrated when the jar was
    shaken, fats and oils are insoluble in
    water. When these materials reach the
    small intestine, they are digested with the
    help of an enzyme called lipase.
    However, before lipase can chemically
    digest the fats, the large globules must be
    physically broken into smaller droplets…
                                              96
        Liver Function Demonstration
            “Fat and Bile”
                   (Liver Let Live)

Background Knowledge:
•   A greenish liquid called bile, which is
    produced by the liver and stored in the
    gallbladder, helps break down the fat
    globules. Bile distributes broken down fat
    molecules evenly through the small
    intestine in a process known as
    emulsification. The cloudy mixture
    produced in this demonstration is similar
    to the emulsified liquid produced by bile!97
    The End of the Line
Please follow along as “The End of the
 Line” section of your book on page 60
          is being read to you.
Try to come up with 4 important facts
           about this section.
Raise your hand and tell us what
   you think in your own words!


                                     98
   Graphic Organization:
Reading Strategies that Work!



         The End of the
              Line




                                99
        The End of the Line
            Vocabulary
  Reread “The End of the Line”
 section on page 60 of your textbook
 and write your own detailed
 definition for the following word:


Large Intestine: ??????

                                       100
               Vocabulary
Large Intestine:
  The large intestine is a large organ that
  reabsorbs water from the digestive tract
  and stores, compacts, and eliminates
  indigestible material from the body




                                              101
             Digestive System Model
   “The Life of a Food Particle!”
Question:
What happens to the food we eat?
Background Knowledge:
What do you already know about the digestive
 system?
Share your answer with your neighbor!
Materials:
Large plastic bag, paper sacks, M&M’s candy,
  markers, newspaper, trash can, zip-lock bags,
  masking tape, sponges, spray bottles            102
           Procedures:
1. Listen for special instructions
   from your teacher.
2. Answer the discussion
   questions in your packet!




                                     103
         Digestive System Model
  “The Life of a Food Particle!”
Discussion Questions:
1. Make a list of the parts of the
   digestive system and how each
   part/job was modeled in this
   classroom activity.
2. Which part/job were you and
   part/job did you like the best?
                                     104
 Problems with the Digestive
          System
 Please follow along as “Problems with
    the Digestive System” section of
  your book on page 60 and 61 is being
               read to you.
Try to come up with 4 important facts
            about this section.
Raise your hand and tell us what
   you think in your own words!

                                     105
      Graphic Organization:
   Reading Strategies that Work!
Heartburn:                     Constipation and
                               Diarrhea:



                 Problems in the
                Digestive System

Colon Cancer:                  Gastric Ulcer:



                                                106
Small Intestine vs. Large Intestine:
Does size really matter?

Small Intestine       Large Intestine




                                        107
               Section Review
1. What happens to the food that you eat when it
   gets to the stomach?
Raise your hand and tell us what you wrote on your paper!

2. Describe the roles of the liver, the gallbladder,
   and the pancreas in digestion.
Raise your hand and tell us what you wrote on your paper!

3. How would the inability to make saliva affect
   digestion?
Raise your hand and tell us what you wrote on your paper!
                                                      108
             Section Review
1. What happens to the food that you eat when it
   gets to the stomach?

The contractions of the stomach break
food into smaller pieces. Chemical
digestion by enzymes, water, and acids
breaks bonds in the food.


                                                   109
              Section Review
2. Describe the roles of the liver, the gallbladder,
   and the pancreas in digestion?
The liver stores nutrients and makes bile,
which is used in the digestion of fat. Bile is
stored in a small, baglike organ called the
gallbladder. The pancreas makes pancreatic
juice, which contains enzymes for
digesting proteins, starches, and fats and
contains bicarbonate for neutralizing the
acid in chyme.                                         110
             Section Review
3. How would the inability to make saliva affect
   digestion?
     Without saliva, swallowing would be
   more difficult and the digestion of
   carbohydrates would not begin until the
   food reached the stomach.



                                                   111
     Human Body System
         Chapter 3
       Section 2
Lesson Presentation PowerPoint
         By Chad Clark



                                 112

								
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