Lesson 4 - Your Digestive System
Name: ______________________ Date: ____________
Write the letter of the matching definition next to each term.
1. digestion
A. Any materials unused and rejected as worthless or unwanted
2. saliva
B. The longest part of the alimentary canal
3. stomach
C. A clear liquid secreted into the mouth by the ___ glands and mucous glands of the mouth
4. small intestine
D. Edible seeds or roots or stems or leaves or bulbs or tubers or nonsweet fruits of any of numerous
5. food
E. To lessen in force or effect
6. change
F. Any of various organs that synthesize substances needed by the body and release it through ducts (plural)
7. teeth
G. Clear liquid we drink that falls as rain
8. mouth
H. To make something different
9. soften
I. The liquid part that can be extracted from plant or animal tissue by squeezing or cooking (plural)
10. swallow
J. A small amount of liquid food
11. juices
K. The kind and number and arrangement of ___ in a person or animal
12. glands
L. What we eat to get energy and grow
13. waste
M. The externally visible part of the oral cavity on the face and the system of organs surrounding
14. fruit
N. Sweet food that grows on plants
15. vegetable
O. An enlarged and muscular saclike organ of the alimentary canal
16. water
P. Physical activity that keeps you fit
17. exercise
Q. The process of decomposing organic matter by bacteria or by chemical action or heat