HUMANS

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Across
  1. 4. The color of carbon dioxide rich blood
  2. 7. The body system that helps us move and gives shape to the body
  3. 10. Gas transported from body to lungs
  4. 12. The bones that protect the heart and lungs
  5. 13. The organ used for breathing in air
  6. 14. The color of oxygen rich blood
Down
  1. 1. The bones that protect the brain
  2. 2. The act of breathing in air
  3. 3. Hard structures that support and protect the body
  4. 5. The act of breathing out air
  5. 6. Helps to transport oxygen and nutrients through the whole body
  6. 8. The connection between 2 or more bones
  7. 9. The organ that pumps blood around the body and is protected by the ribs
  8. 11. Gas transported from lungs to body