Across
- 2. the secretions of enzymes throughout your digestive tract.
- 4. cells that have the special ability to shorten or contract
- 6. very tiny blood vessels
- 7. An organ that makes one or more substances
- 8. the system in living organisms that takes up oxygen and discharges carbon dioxide in order to satisfy energy requirements.
- 9. A blood vessel that carries blood from the heart to tissues and organs in the body.
- 12. food is broken down by processes that are not chemical in origin.
- 13. groups of organs and tissues that work together to perform important jobs for the body
- 15. controls everything you do, including breathing, walking, thinking, and feeling.
- 16. system of organs responsible for getting food into and out of the body and for making use of food to keep the body healthy.
- 17. a system of organs that includes the heart, blood vessels, and blood which is circulated throughout the entire body of a human or other vertebrate.
- 18. chemical substances that act like messenger molecules in the body
- 19. self-regulating process by which biological systems maintain stability while adjusting to changing external conditions
- 20. an organ system responsible for providing strength, keeping up the balance, maintaining posture, allowing movement, and producing heat.
Down
- 1. Your body's central framework
- 3. The systems that excrete wastes from the body
- 5. the glands and organs that make hormones and release them directly into the blood so they can travel to tissues and organs all over the body
- 10. The tissues, glands, and organs involved in producing offspring
- 11. returns deoxygenated blood from your organs back to your heart
- 14. an elongated contractile cell that forms the muscles of the body