Knowledge Activity

2. A group off different types of tissues that work together to perform a single function
5. An Organ system is a group of organs that perform closely related functions
7. Digestive organ in which most chemical digestion and absorption of food takes place
12. Is the fisical breakdown of large pieces of food into smaller pieces
16. As fodd passes through the digestive system, it is broken down in two ways, this step is called...
17. Organic molecules that the body needs in very small amounts
18. Enzymes break down food into the small molecules the body can use
22. Organ in the digestive system that removes water from the undigested material that passes through it
24. Contractions of smooth muscles
25. Is the amaount of heat, which is measured in terms of calories
26. Tube connecting the mouth to the stomach
28. Large muscular sac that continues the mechanical and chemical digestion of food

1. Major source of energy
3. Once food has been broken into small molecules, it can be absorbed by cells in the small intestine
4. Describes the relatively constant internal physical and chemical conditions that organims maintain despite changes in internal and external environments
6. Is the process in which a stimulus produces a response that opposes the original stimulus
8. Enzyme in saliva that breaks the chemical bonds in starches
9. Mixture of enzymes and partially-digested food
10. Help the body absorb fat-soluble vitamins
11. The most important nutrient
13. The first step of digestive system
14. The tissue that lines the interior and exterior bodysurfaces
15. Neurons,the cells that carry these impulses, and glial cells
18. Type of tissue that provides support for the body and connects its parts
19. Movements of the body are possible because of it
20. The final step in the digestive system
21. It is available in food
23. Inorganic nutrients that the body needs, usually in small amounts
24. Needed by the body for growth and repair
27. Enzyme that breaks down proteins intoo smaller polypeptide fragments