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Review of the Human Body Systems

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					Review of the Human Body
        Systems
        Created by
        Mrs. Wallace
          Body Systems
 Skeletal System
 Muscular System
 Circulatory System
 Digestive System
 Nervous System
     The Skeletal System
What would happen if
   humans didn't have
         bones?
  You'd be floppy like a
beanbag. Could you stand
 up? Forget it. Could you
 walk? No way. Without
  bones you'd be just a
puddle of skin and guts on
        the floor.
 The Skeletal System works with the
 Muscular System to move your body
             How do my bones move?
   With a lot of help. You need muscles to pull on
bones so that you can move. Along with muscles and
 joints, bones are responsible for you being able to
  move. Your muscles are attached to bones. When
   muscles contract, the bones to which they are
attached act as levers and cause various body parts
                       to move.
         The Muscular System
Muscles are the part of our
 body that allow us to move.
 They make up almost half of
  the weight of our bodies.
 They are made up of special
   tissues.When brain gives                 QuickTime™ and a
                                  TIFF (Un compressed) decompressor
muscles a signal, those tissues     are neede d to se e this picture.

can contract, or shorten. The
muscles are attached to bones
 by tendons. Tendons pull on
the bones and cause our limbs
           to move.
                  Types of Muscles


   Smooth            Caridac            Skeletal
Type Title Here   Type Title Here    Type Title Here
      Pictures of Muscle Types
   Cardiac Muscles

   Skeletal Muscles

   Smooth Muscles
                    Smooth Muscles
                                        Smooth muscles are sometimes also
                                            called involuntary muscles and
                                             they are usually in sheets, or
                                           layers, with one layer of muscle
                                              behind the other. You can't
                                          control this type of muscle. Your
          QuickTime™ an d a
TIFF (Uncompressed) decompressor          brain and body tell these muscles
                                              what to do without you even
   are need ed to see this p icture .


                                           thinking about it. You can't use
                                            your smooth muscles to make a
                                           muscle in your arm or jump into
                                                        the air.
                          Cardiac Muscle
   The muscle that makes up the heart is called cardiac muscle. It is also known as
    the myocardium (say: my-uh-kar-dee-um). The thick muscles of the heart
    contract to pump blood out and then relax to let blood back in after it's
    circulated through the body.
   Just like smooth muscle, cardiac muscle works all by itself with no help from
    you. A special group of cells within the heart are known as the pacemaker of the
    heart because it controls the heartbeat.



                                               QuickTime™ and a
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          Skeletal Muscles
Skeletal muscles are
   voluntary muscles,
 which means you can
 control what they do.
Your leg won't bend to
  kick the soccer ball
 unless you want it to.
          Skeletal Muscles
Together, the skeletal muscles work
   with your bones to give your body
 power and strength. In most cases, a
   skeletal muscle is attached to one
  end of a bone. It stretches all the
  way across a joint (the place where
  two bones meet) and then attaches
         again to another bone.
        Skeletal Muscles
Skeletal muscles are held to the
  bones with the help of tendons
   (say: ten-dunz). Tendons are
 cords made of tough tissue, and
  they work as special connector
 pieces between bone and muscle.
The tendons are attached so well
  that when you contract one of
   your muscles, the tendon and
     bone move along with it.
                Muscular System Song
Muscles of three types you'll find Skeletal, smooth, and the cardiac kind. Skeletal
             muscles come in pairs with the bones you’ll find them there
Workin’ together to make you strong, one gets short while the other long, like your
                arm when muscles flex, Biceps short and long triceps
    Chorus: Your heart is a muscle too, Skeletal type working like a smooth, A
   specialized muscle called the cardiac, But your skeletal muscles go right up your
                   back If you’ve ever navigated on the Erie Canal
Voluntary muscles all Striated, the skeletal Tendons at the bones connect With the
                                 joints so they can flex
   Involuntary are the kind That move with no choice from your mind Like your
         stomach with muscles smooth And in the walls of blood vessels too
                      *Click the link to hear music and lyrics
      Fun Facts about Muscles…
   You have over 30 facial muscles which
    create looks like surprise, happiness,
    sadness, and frowning.
   Eye muscles are the busiest muscles in the
    body. Scientists estimate they may move
    more than 100,000 times a day!
   The largest muscle in the body is the
    gluteus maximus muscle in the buttocks.
       The Circulatory System
Made up of the heart, blood and
  blood vessels, the circulatory
  system is your body's delivery
  system. Blood moving from the
  heart, delivers oxygen and
  nutrients to every part of the
  body. On the return trip, the
  blood picks up waste products so
  that your body can get rid of
  them.
The Circulatory System
                      Fun Facts!
      One drop of blood contains a half a drop of
        plasma, 5 MILLION Red Blood Cells, 10
          Thousand White Blood Cells and 250
                   Thousand Platelets.
        You have thousands of miles of blood
       vessels in your body. "Bill Nye the Science
       Guy" claims that you could wrap your blood
           vessels around the equator TWICE!
      Keep your heart healthy...it's going to have
         to beat about 3 BILLION times during
                      your lifetime!
              The Digestive System
   When you eat, your body digests the
    food so your cells can use it to make
    energy.
   Acids and enzymes eat away at the
    surface of food to break it down.
    The small intestine is where food is
                                                       QuickTime™ a nd a
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                                                are need ed to see this picture.

    broken down into molecules tiny enough
    for the body cells to use.
   In the villi are tiny tubes that carry
    blood called VESSELS. Food molecules
    are taken into these blood vessels.
    Once the food is in the blood, it can
    travel all over the body.
                 Digestive System
Fun Facts!
   HOW LONG ARE YOUR INTESTINES? At
    least 25 feet in an adult. Be glad you're not a
    full-grown horse -- their coiled-up intestines
    are 89 feet long!
   Chewing food takes from 5-30 seconds
   Swallowing takes about 10 seconds
   Food sloshing in the stomach can last 3-4 hours
   It takes 3 hours for food to move through the
    intestine
   Food drying up and hanging out in the large
    intestine can last 18 hours to 2 days!
   In your lifetime, your digestive system may
    handle about 50 tons!!
The Nervous System
   Made up of your brain, your spinal
    cord, and an enormous network of
    nerves that thread throughout
    your body, it's the control center
    for your entire body. Your brain
    uses information it receives from
    your nerves to coordinate all of
    your actions and reactions.
    Without it, you couldn't exist!
                 Nervous System
                        Fun Facts!
   Did you know that you have more sensory neurons in
      your tongue than in any other part of your body?
      Many of the drugs that neuroscientists use to
    study the nervous system are from toxic plants and
    venomous animals such as snakes, spiders, snails and
                         pufferfish.
      Human neurons are so small you have to use a
      microscope to see them. However, some neurons
                can be up to three feet long.

				
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