Across
- 6. Mechanical digestion involves physically breaking down food substances into smaller particles to more efficiently undergo chemical digestion.
- 10. Takes up oxygen from the air we breathe and expels the unwanted carbon dioxide.
- 11. The system that contains the heart and the blood vessels and moves blood throughout the body.
- 15. A self-regulating process by which an organism can maintain internal stability while adjusting to changing external conditions.
- 16. The organs that take in food and liquids and break them down into substances that the body can use for energy, growth, and tissue repair.
- 17. Your body's support structure.
- 19. Composed of cells that have the special ability to shorten or contract in order to produce movement of the body parts.
- 20. The tissues, glands, and organs involved in producing offspring (children).
Down
- 1. 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.
- 2. An organ system responsible for providing strength, keeping up the balance, maintaining posture, allowing movement, and producing heat.
- 3. An organ that makes one or more substances, such as hormones, digestive juices, sweat, tears, saliva, or milk.
- 4. Blood vessels located throughout your body that collect oxygen-poor blood and return it to your heart.
- 5. Consist of a single muscle cell.
- 7. Delicate blood vessels that exist throughout your body.
- 8. A vital biological system that removes excess and waste products from the body to maintain homeostasis.
- 9. Chemical substances that act like messenger molecules in the body.
- 12. An organism's control center.
- 13. A blood vessel that carries blood from the heart to tissues and organs in the body.
- 14. The human body self-regulates to maintain a stable internal environment despite changes in the external environment.
- 18. An organization of varying numbers and kinds of organs so arranged that together they can perform complex functions for the body.