Across
- 2. cells in the nervous system that transmit signals in the body
- 4. digestive organ where nutrients are transferred into the bloodstream
- 6. system that provides framework, support, and protection
- 12. the type of muscle found around internal organs that is involuntary
- 13. muscle that controls the respiratory system
- 14. main organ of the integumentary system
- 15. blood vessels that carry blood away from the heart
- 16. system responsible for removing waste from the body
Down
- 1. clusters of sacs in the lungs where gas exchange occurs
- 3. maintaining a controlled, stable internal environment in the body
- 5. long muscular tube that carries food to the stomach
- 7. connect muscles to bones to enable movement
- 8. system that provides movement, posture, and warmth
- 9. system that prevents and limits infection from foreign agents
- 10. chemical messengers made and distributed by the endocrine system
- 11. connect bones to other bones