Body Systems and Homeostasis

3. The framework that supports the soft tissues of vertebrate animals and protects many of their internal organs
5. a biological occurrence wherein the output of a system amplifies the system (positive feedback) or inhibits the system (negative feedback).
6. to maintain a stable internal environment despite changes in the external environment
9. The role of chemical digestion is to further degrade the molecular structure of the ingested compounds by digestive enzymes into a form that is absorbable into the bloodstream.
11. a passive biological system that removes excess, unnecessary materials from the body fluids of an organism
13. chemical substances that act like messenger molecules in the body.
14. smallest type of blood vessel
15. system of organs that includes the heart, blood vessels, and blood which is circulated throughout the entire body of a human or other vertebrate
16. the mechanical breaking down of food(chewing
17. A blood vessel that carries blood from the heart to tissues and organs in the body.(carries blood towards the heart)
19. an organ system consisting of skeletal, smooth, and cardiac muscle.
20. an elongated contractile cell that forms the muscles of the body

1. the system that involves breaking down the food you eat and turning into nutrients
2. This system sends messages back and forth between the brain and the body.
4. A state of balance among all the body systems needed for the body to survive and function correctly.
7. A blood vessel that carries blood from the heart to tissues and organs in the body.(carries blood away from the heart)
8. the network of organs and tissues that help you breathe
10. The tissues, glands, and organs involved in producing offspring
12. This system uses hormones to control and coordinate your body's metabolism, energy level, reproduction, growth and development, and response to injury, stress, and mood.
18. An organ that makes one or more substances, such as hormones, digestive juices, sweat, tears, saliva, or milk.