Pig Dissection abdominal cavity by benbenzhou

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									2010 Pig Dissection
    Step One – 6/1
 Answer the 13 questions on the next slide on a sheet of paper
 Label the pig diagram worksheet
 Label the diagram of the cat skeleton on the worksheet with the
  bones listed on slide #4

 Put it all into a manila folder with your name on it; this will be
  your “Pig Journal”
1.  Where are fetal pigs obtained?
2.  How many pigs are usually found in a litter?
3.  What is the accepted method for determining the age of a fetal pig?
4.  What is the genus and species of the domestic hog?
5.  Pigs belong to the order Artiodacyla. What are some animals that are
    closely related to the pig?
6. What type of diet do pigs eat?
7. How long do pigs usually live for?
8. Why is a pig a better specimen to study than a frog or fish in human
9. What are two major distinguishing characteristics of mammals?
10. Define the following-      Anterior                  Lateral
                             Posterior                  Medial
                             Dorsal                     Proximal
                             Ventral                    Distal

11. What are the three planes of the body?
12. What is the difference between digitigrade and plantigrade locomotion?
13. How can you determine a male pig from a female pig?
Carpals       Patella
Femur         Phalanges (Digits)
Sacrum        Radius
Fibula        Scapula
Humerus       Sternum
Maxila        Tarsals
Metacarpals   Tibia
Metatarsals   Ulna
Nasal Bone    Vertabrae
Step Two – 6/2
 Obtain a pig and record all of the following information on a
  separate sheet of paper
   Number your papers in the top right-hand corner in
    chronological order
 Determine the age and sex of your pig
 Name the pig
 Observe all of the external anatomy found on the worksheet
  from yesterday
Step Two – 6/2
 Read pages 18 – 22
 We will be observing the external muscles first
 Follow the instructions on page 20, and make the cuts found
  on page 22
 Skinning the pig will probably take between 2 - 4 days.
   It is very important to go slowly and do good work
   The best technique is to use a blunt probe or your finger, rather
    than a scalpel
Step Three– 6/3
 Continue to skin the pig, as per Day Two instruction
   When finished, let me know so I can observe and sign off on
 Once finished, it is time to observe the superficial muscles
 You will be responsible for the muscles on the next slide…
   You will be “pinning” and recording the functions of each
    muscle in your journal
   Take your time and label each pin with a piece of tape with a
 Record procedures and observations in journal
   Be sure to date and number each page, keep papers in
    chronological order
 These muscles are superficial, and there is no need to
  make any incisions for this portion of the dissection

Ventral muscles               Lateral Muscles
1. Pectoralis major           9. Deltoid
2. Latissimus dorsi           10.Intercostal
3. External oblique           11.Triceps brachii
4. Rectus abdominus           12.Gluteus maximus
5. Sartorius                  13.Biceps femoris
6. Brachiocephalic            14.Semitendinosis
7. Sternomastoid              15.Semimembranosus
8. Sternohyoid                16.Gastrocnemius
Step Four– 6/4
 After completing the muscles, you will move on to the oral
 Read pages 52-53 and record the following information in
  your notes-
   The nine bold vocabulary words and a brief description of each
   Identify the dental formula in fetal pigs and explain what it
   Comment on how it differs from humans
 Proceed to cut the jaw line and identify the structures shown
  on pages 54 – 55. Be prepared to show these to me.
Step Five
 Once you’re done with oral cavity, move on the abdominal
   Read and list the function of all the organs found on page 58
    – 60.
   Study the incisions to be made on page 61. Make the cuts 1
    through 4 and open up the abdominal cavity
   Be gentle with the scalpel, don’t cut too deeply.
   After identifying what you can see without moving the
    organs, please make a drawing of the open abdominal cavity.
    Do so to the best of your ability. Label as much as you can.
   The final step here will consist of showing the organs to me.
Step Six
 Once you’re done with the abdominal cavity, move on the
    thoracic cavity.
   Read and list the function of all the organs found on page 68
    – 69.
   Study the incisions to be made on page 61. Make the cuts 5
    and 6 and open up the thoracic cavity
   Be gentle with the scalpel, don’t cut too deeply.
   Identify the organs found on pages 68-69 and show them to
Step Seven
 Remove the digestive system. Do so carefully as to not sever
  the coils of the intestines.
 Remove the stomach from the intestines. Cut open the
  stomach lengthwise and record your observations as to how
  it looks. What is the substance inside the stomach?
 Attempt to straighten out the small and large intestine. Try
  to get a measurement of how long is and record this
Step Eight
 Remove the heart. Cut the heart open lengthwise and
  record your observations
 What are the different chambers of the heart called?
 Which side of the heart receives deoxygenated blood from
  the body?
 Which side of the heart pumps oxygenated blood to the
Step Nine
 If female, find and observe the ovaries and uterus. Point out
  these structures to me.
 If male, carefully cut the scrotum. Find the testes and the
  penis. Point these out to me.
Step Ten
 Read pages 113 – 118 in regard to dissecting the nervous
   Follow the procedures as outlined. Do so carefully. The
    ultimate goal is to have a pig that resembles the picture on
   Show me your results.
   Carefully remove the brain and make observations.
   Now is the time you can do any other procedures you desire,
    so long as you are remaining scientific. This means you Greg.
 Dispose of the pig and all remains in the trashcan.
  Thoroughly wash your dissecting tray and instruments.

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