Comparative Anatomy: The Human and Rat Digestive System

Choose a color for each organ. Color the circle and the organ.

Stomach	Liver	Esophagus	Pancreas
Pharynx	Common Bile Duct	Transverse Colon	Gallbladder
Descending Colon	Ascending Colon	Sigmoid Colon	Appendix
Jejunum	Ileum	Duodenum	Rectum

Questions:

1. Which structure is responsible for storing bile?

2. After food leaves the small intestine, where does it go?

3. Which structure is responsible for the absorption of nutrients from food?

4. The first section of small intenstine is called the..?

5. Which section of colon is directly before the rectum?

---

6. Identify three structures in the rat that are similar to those found in the human.

7. Identify one structure in the rat that you will not find in the human digestive system.

8. The alimentary canal is the series of organs that food passes through as it is digested. Identify these organs starting at the esophagus and ending at the rectum.

9. How does the liver of the rat differ from the liver of a human?

10. What organs are found in the thoracic cavity of both the rat and the human?
What structure marks the boundary of the thoracic cavity from the abdominal cavity?