Digestive System: Anatomy Review

As stated in the previous thread, please type the question out.

There are pictures with it... that is why I just posted the PDF file.

Interactive Physiology Worksheet:
Digestive System: Anatomy Review
1. List two main divisions of the digestive system.
1. _____________________________ ______________________
2. _____________________________ ______________________

2. The four main layers of the digestive tract wall are:
1. Mucosa
2. Submucosae
3. Muscularis Externa
4. Serosa

3. Label the diagram below with the four main layers you listed in question 2.

4. The mucosa includes a type of columnar cell that forms the inner lining of
the lumen.
5. Blood and lymph vessels of the mucosa are found in its __________________ _______________
connective tissue layer.
6. The smooth muscle layer of the mucosa is called the __________________ _________________.
 The function of epithelial goblet cells is to secrete _____________________________ __.
8. _________________________ cells of the mucosa secrete hormones into the blood.
9. Absorption of nutrients occurs through the mucosal epithelium and into either _____________
or ________________________ vessels.
10. Label the vessels you listed in question nine in the diagram below.
11. The muscularis mucosa has both ______________________ and _______________________
fibers that function in moving the villi to aid in digestion and absorption.
12. The built-in (intrinsic) network of nerve cells in the submucosa is the ________________
______________.
13. The two types of movements produced by contractions of the muscularis externa are
___________________________ and _____________________________ .
 The network of neurons in between the two muscle layers of the muscularis externa is the
__________________________ ____________________________.
15. The mouth, with its ________________ ______________ epithelium, is involved in both
chemical and _____________________ digestion.
16. List the four regions of the stomach:
1. _____________________________ _____________________________ ___________
2. _____________________________ _____________________________ ___________
3. _____________________________ _____________________________ ___________
4. _____________________________ _____________________________ ___________
17. List the three sheets of muscle in the stomach’s muscularis externa:
1. _____________________________ _____________________________ __________
2. _____________________________ _____________________________ __________
3. _____________________________ _____________________________ __________
18. Label the three sheets of muscle in the stomach’s muscularis externa in the diagram below.

List, in order from the pylorus to the colon, the three regions of the small intestine:
1. _____________________________ _____________________________ _______
2. _____________________________ _____________________________ _______
3. _____________________________ _____________________________ _______
20. From largest to smallest, list the three modifications of the small intestine’s inner wall that
function to increase surface area:
1. _____________________________ _____________________________ __________
2. _____________________________ _____________________________ __________
3. _____________________________ _____________________________ __________
21. Label two of the modifications of the intestine to increase surface area in the following diagram.
22. The microvilli of the small intestine’s epithelial cells form the _________________ border.
23. The large intestine absorbs __________________, __________________, and ______________.
24. Starting from the ileocecal valve, trace the path of undigested material through the large
intestine (on the diagram below).

The anus is lined with ______________________ ___________________________ epithelium.
26. List the six sphincters of the digestive tract:
1. _____________________________ _____________________________ _______________
2. _____________________________ _____________________________ _______________
3. _____________________________ _____________________________ _______________
4. _____________________________ _____________________________ _______________
5. _____________________________ _____________________________ _______________
6. _____________________________ _____________________________ _______________
27. The single digestive function of the liver is to produce ____________________________.
28. The main digestive enzyme–producing organ in the body is the _______________________.
29. Three pairs of __________________ ________________ function to moisten food in the mouth.

Post Merge: 9 years ago

The only ones that I can't find the answers to now are the ones with the pictures, which can only be viewed in the PDF.  I figured out the rest of the answers.

Post Merge: 9 years ago

I just need pointed in the right direction for the labeling for the picture questions. I have the rest of the questions answered now.