Human Body Systems

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Across
  1. 5. Tiny air sacs in the lungs where gas exchange occurs.
  2. 7. The system that processes food into nutrients.
  3. 11. The main organ of the respiratory system.
  4. 12. An organ that processes nutrients and removes toxins from the blood.
  5. 13. The cells that make up the nervous system.
  6. 15. Organs that filter waste from the blood.
  7. 17. Provides structure and support to the body.
  8. 19. The longest bone in the human body.
Down
  1. 1. The control center of the body.
  2. 2. Organ that pumps blood through the body.
  3. 3. These send messages to and from the brain.
  4. 4. Blood vessel that carries oxygen-rich blood away from the heart.
  5. 6. The areas where bones connect and allow movement.
  6. 8. A type of blood vessel that carries blood back to the heart.
  7. 9. These contract and relax to create movement.
  8. 10. Connects muscle to bone.
  9. 14. Blood Cells These carry oxygen throughout the body.
  10. 16. The largest organ in the body.
  11. 17. Organ that breaks down food using acid and enzymes.
  12. 18. The system that removes waste from the body.