Human Body Systems Review

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