BODY SYSTEMS AND HOMEOSTASIS:

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Across
  1. 5. consists of organs used for gas exchange
  2. 6. internal framework of the human body
  3. 9. maintains a stable internal environment despite changes in the external environment
  4. 10. vessels that carry oxygen-rich blood from the heart to organs
  5. 12. organs that take in and break down food and liquids
  6. 13. an organ that creates and releases one or more substances
  7. 14. vessels that collect oxygen-poor blood and return it to your heart
  8. 17. glands and organs that make and release hormones
  9. 18. involved in producing offspring
  10. 19. removes unnecessary materials from the body fluids
  11. 20. smallest blood vessels in vascular system
Down
  1. 1. consists of a single muscle cell
  2. 2. moves blood throughout the body
  3. 3. permits movement and maintains posture in the body
  4. 4. chemical substances that act like messenger molecules
  5. 7. amplifying the change or output
  6. 8. includes the brain, spinal cord, and transmits signals
  7. 11. reduces the change or output
  8. 15. composed of cells that can shorten or contract
  9. 16. maintain internal stability while adjusting to changing external conditions