Organ Systems

1. our body's 'sewerage system'
3. A pea-sized body attached to the base of the brain
5. a passive biological system that removes excess, unnecessary materials from the body fluids of an organism
7. your body's central framework
9. a long, tube-like band of tissue
11. a biological system consisting of specific organs and structures used for gas exchange in animals and plants
13. the spongy tissue inside some of your bones such as your hip and thigh bones
15. We are born with about 300 soft _____
18. either of a pair of tubes along which eggs travel from the ovaries to the uterus.
19. pumps blood from the heart to the lung
20. consists of the gastrointestinal tract
21. the prominent structure between the eyes that serves as the entrance to the respiratory tract and contains the olfactory organ

2. your body's outer layer
4. largest internal organ
6. is one of three types of vertebrate muscle tissue with the other two being skeletal muscle and smooth muscle
8. complex network of glands and organs
9. our bodys outmost layer of protection
10. It plays an essential role in converting the food we eat into fuel for the body's cells
12. composed of specialized cells called muscle fibers.
14. highly complex part of an animal that coordinates its actions and sensory information
16. is the biological system made up of all the anatomical organs involved in sexual reproduction.
17. is divided into four chambers consisting of two atria and two ventricles