The Digestive System Worksheet

1.What is the digestive tract? A long continuous tube with food first entering it at the mouth.
2.What happens to undigested materials in the digestive tract?
3.Sketch the path that food takes through the digestive tract. Be sure to include the mouth, esophagus, stomach, duodenum, small intestine, appendix, large intestine rectum, and all 4 sphincters. (on sheet of paper)
4.What is the function of the mouth in the digestion process? The teeth and tongue begin the mechanical breakup of food and mix it with saliva.
5.What is the term for the small mass of food that enters into the esophagus? bolus
6.What triggers peristalsis? presence of the bolus in the esophagus triggers peristalsis.
7.What is the function of the cardiac sphincter? Closes the entrance to the stomach and prevents its contents from re-entering the esophagus
8.What is the mucous membrane? protective mucous coating which prevents digestion
9.How long is the small intestine? 20 feet long
10.Where does most digestion and absorption of nutrients take place? small intestine
11.What increase the surface area of the small intestine? villi
12.What is the first section of the small intestine? What is its function?

13.Where is bile stored? gallbladder
14.What is segmentation? grabbing of a tube tightly at various places around the middle and squeezing so its contents are broken into smaller pieces
15.When does the ileocecal sphincter open? when the food builds up in the small intestin.
16.What is the function of the anal sphincter? Stops waste from leaving body until you make it
17.What is the function of the appendix in humans?
18.Where does digestion begin? mouth
19.What is gastric juice made of? Hydrochloric acid and enzymes
20.Where are enzymes released in the small intestine produced? the pancreas
21.What is the function of the following enzymes: amylase, lactase, maltase, sucrase, and lipase? enzymes:
22.There are two ways that nutrients get into the blood stream. Describe each method.