Body Systems

1. ______ digestion is the breakdown of large food particles to smaller food particles by enzymes and chemical processes.
5. _____ system breaks down food into smaller parts for absorption into the body.
7. Tiny blood vessel that connects arteries to veins
10. Organelle that stores water and other substances required by the cell.
11. Organelles that convert energy the cell receives into a form that it can use.
13. Thin structure that encloses all the contents of plant and animal cells
16. An abnormal condition affecting the body of an organism.
20. Wave-like muscle contractions along the digestive system.
21. Contents of the cell inside the cell membrane excluding the nucleus
23. Group of tissues that work together to perform a specific function.
25. Tiny air-filled sacs at the end of the bronchial tubes in your lungs, where gas exchange takes place (oxygen is absorbed and carbon dioxide is excreted).
27. ______ system transports blood reaching every cell in the body

2. A layer of material that serves as a barrier to certain particles.
3. Diffusion of water through a selectively permeable membrane.
4. The basic unit of life.
6. _____digestion is the physical breakdown of food into small particles.
7. Organelle that converts sunlight into food
8. A structure or behaviour that increases the organisms chance of survival or reproduction.
9. Group of similar cells working together to perform a specific function.
12. Blood vessel that carries blood from the heart to the rest of the body.
14. ______system provides a mobile support frame for the body; protects soft tissue organs.
15. Outer covering of a cell that provides strength and support; found only in plant cells.
17. ______system removes chemicals and gaseous wastes from the body.
18. ______ system supplies blood with oxygen from the outside air and removes carbon dioxide from you blood.
19. The movement of particles from an area of higher concentration to an area of lower concentration.
22. Organelle that directs all the activities in a cell. Contains all of the cell's DNA.
24. ______ system coordinates and controls all organs and organ systems; detects, processes, and responds to stimulii.
26. Blood vessels that carry blood from the body back to the heart.