HUMAN DIGESTIVE SYSTEM

Student Name ______

1.

1.What is peristalsis? ______

2.The hepatic portal vein carries blood from the alimentary canal to the ______

3.What are the products of fat digestion? ______

4.State a role of beneficial bacteria in the alimentary canal______

5.State two good sources of protein in the human diet. ______

6.State two ways in which villi are adapted for the absorption of soluble foods.
______

7.Name a process by which soluble foods are absorbed into the blood from the small intestine.
______

8.What type of food is mainly absorbed into the lacteal? ______

9.What are the final products of the digestion of a protein? ______

10.What is meant by egestion? ______

11.Bile is secreted by the ______

12.State one reason why a low pH is important in the stomach ______

13.Where is the epiglottis? ______
What is it’s function? ______

14.(a) Name a carbohydrate-digesting enzyme in the human alimentary canal.______
(b) Where in the alimentary canal does this enzyme act? ______
(c) State the enzyme’s product(s). ______

15.State a role that the liver plays in the digestive process. ______

16.Write the dental formula for an adult human. ______

17.Give one function of symbiotic bacteria in the human digestive system. ______
______

18.Where in the digestive system are the products of digestion absorbed? ______
State one way in which this part of the system is adapted for absorption. ______

19.In which part of the digestive system is water absorbed? ______
Give another function of this part of the digestive system. ______

20.An organ for churning of food to chyme is the ______

21.Waves of contractions passing along the gut is ______

22.What type of teeth grind food into smaller pieces? ______

23.Distinguish between mechanical and chemical digestion. ______
______

24.Name a structure in the human digestive system, other than teeth, which is involved in mechanical digestion ______

25.Bile is involved in digestion in the human body.
(a) Where is bile produced? ______
(b) Where is bile stored? ______
(c) Where does bile act in the alimentary canal? ______

26.State a benefit of dietary fibre ______

2. (a) What are the four main types of teeth? ______
(b) What causes tooth decay? ______
(c) Suggest two ways you can protect your teeth from decay. ______
______
(d) The bacteria that form plaque respire anaerobically. What does anaerobic mean?
______
How do these bacteria bring about tooth decay? (Hint: What happens when bacteria respire
anaerobically?) ______

3. Look at the diagram of the digestive system.
(a) Name the parts labelled A to J.
A = ______
B = ______
C = ______
D = ______
E = ______
F = ______
G = ______
H = ______
I = ______
J = ______
(b) Match the labels on the diagram to these functions:
(i) Absorbs a lot of water ______

(ii) Contains acid. ______

(iii) Stores faeces before release. ______

(iv) Makes bile. ______

(v) Stores bile. ______

(vi) Joins the throat and stomach. ______

(vii) Most absorption takes place here. ______

(viii) Has no function in humans. ______

(ix) Faeces pass out here. ______

(x) Makes pancreatic juice. ______

4. Match each of the parts of the body in the left-hand column with its function in the right-hand column.

Mouth / Pepsin works here
Colon / Makes urea
Pancreas / Most food is absorbed here
Liver / Food is chewed here
Small intestine / Makes enzymes and insulin
Stomach / Useful bacteria live here