Final Product: Fetal Pig Dissection
Part A: External Anatomy
1.
2.
3.
4.
5.
Fetal pig length in cm:__________
Age of fetal pig:__________
Description of hair found on fetal pig.
Number of toes: _______ Hooves: _______
Number of mammary papillary: ________
Cm
In
Approximate
age (days)
1.1
.433
21
1.7
.669
35
2.8
1.01
49
4.0
1.57
56
22.0
8.66
100
30.0
+
11.8
Full term
112-115
Label External Anatomy
A.______________________
D. ___Hooves and Toes_________
B. ______________________
E. ___Umbilicus____
F. ___Mammary Papillae______
G. ___Anus_______________
C. ______________________
Part B: Digestive system
1. What is the function of the liver in a living pig? Filters the blood for specific toxins.
This includes medication, and alcohol.
2. What is the function of the small intestine? Digest- process and breakdown molecules
and Absorb- bring nutrients into the blood stream.
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3. What specific macromolecule(s) is bile used to break down during digestion? Lipase is
made in the gall bladder and is imported into sm. Intestine to break down.
4. What is the importance of the mesentery? Hold and shape the intestines
5. Length in cm of the small intestine: ______
6. Large intestine length in cm: _______
A. ______Liver___________
B. ____Sphincter to Stomach_
C. _stomach______________________
D. Spleen?_______________________
E. Large intestine_______________________
F. __colon?_____________________
G. Anus or rectum_______________________
H. mesentary_______________________
I. duodenum_______________________
J. small intestine_______________________
K. ??_______________________
L. Pyloric valve_______________________
M. _______________________
N. _______________________
O. _______________________
P. ____Liver____________
Digestive System: Product
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1. Create a drawing, tracing, or photograph and identify each of the following in the picture:
esophagus, stomach, small intestine, large intestine, liver, mesentery, pancreas, gall
bladder, spleen, rectum, anus
2. Answer each of the following by writing complete sentences that include the question
asked as a part of the answer.
**Saliva contains water (to moisten food), mucus (to lubricate food), salivary
amylase (to break down starch), bicarbonate (to buffer acids in food), and
antibacterial agents. Why might these last three components be necessary when
the stomach is the next destination anyway?
A. Would you expect carnivores to have longer or shorter intestines than herbivores?
B. What happens if the contents of the colon pass too rapidly through the colon? too
slowly?
3. Complete the following chart identifying the role each of these features and organs play
(copy this chart into your log book or presentation)
Body part or organ
Role
Why is this important?
Salivary Glands
Tongue
Stomach
Small Intestine
Large Intestine
Mesentery
Liver
Pancreas
Gall Bladder
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Part C: Respiratory system
1. What is the function of the diaphragm in a living pig?
Expands to allow breathing in and out
Label Respiratory System
A.larynx______________________
B. __glands____________________
C. trachea______________________
D. _bronchial tubes_____________________
E. _lungs_____________________
F.diaphram
_diaphram_____________________
Respiratory System: Product
1. Identify each of the following in a drawing, tracing, or picture: larynx, trachea,
bronchi, diaphragm, lungs
2. Why does the trachea have cartilaginous rings?
3. Why is it important for air to be moist when it enters the lungs? Many desert mammals
have extremely convoluted nasal cavities. How might these large and complex nasal
cavities conserve water during exhalation?
4. A human pregnancy is typically 40 weeks in length. During human fetal development, the
fetus does not start to produce pulmonary surfactants until about the 34th week of
development. Use your understanding of lungs and pulmonary surfactants to describe
one health concern for babies born prematurely (before the 34th week of development).
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Part D: Circulatory system
1. Which ventricle of the heart has more cardiac muscle? Explain your answer.
2. Label parts of the heart.
A. _____________________
B. _____________________
C.______________________
D.______________________
E.______________________
F.______________________
G.______________________
H.______________________
I._______________________
Figure 4, Heart
Circulatory System Product: Describe the flow of blood through the body, starting
with the right ventricle and ending with the right atrium.
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Part F: Urogenital system
1. Label Male Pig
A.______________________
B. ______________________
C. ______________________
D. ______________________
E. ______________________
2. Label the Female Pig
A.______________________
B. ______________________
C. ______________________
D. ______________________
E. ______________________
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Urogenital System Product:
1. Describe the function of the kidney.
2. What is dialysis and why is it required for a person whose kidneys have failed?
3. Why do most male mammals have testes in an external sac (scrotum)? (Hint: there is
some evidence that men that who wear briefs produce fewer viable sperm than men
that wear boxers).
4.
Cat uterus
Cats, dogs, and rabbits have long, wide horns of the uterus. Humans and pigs
have long fallopian tubes, short horns on the uterus, and one wider, single uterus.
Why is there a difference between these mammals? What might be the
advantages of each type of uterus?
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