The Respiratory System

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Across
  1. 3. carries air to the lungs
  2. 4. this process is how oxygen and carbon dioxide move in between the alveoli and blood stream
  3. 6. this is when your diaphragm contracts, your lungs compress, and carbon dioxide is forced out of the body
  4. 8. this gas is a waste product that is removed from the blood (2 words)
  5. 11. when you inhale this gas diffuses into your lungs
  6. 14. the function of this structure is to prevent food and drinks from entering the lungs
  7. 15. the protein in red blood cells that makes blood red
Down
  1. 1. tiny sacs of air with lots of surface area for gas exchange
  2. 2. this tissue is arranged in rings within the respiratory system to support the trachea and bronchi
  3. 5. this human body system controls breathing so you don't have to think about it (2 words)
  4. 7. this structure is part of the skeletal system, it protects the lungs
  5. 8. this body system transports oxygen and carbon dioxide throughout the body
  6. 9. the muscle that helps the lungs expand and contract
  7. 10. where oxygen and carbon dioxide diffuse in and out of the blood
  8. 12. moistens, filters, and warms air
  9. 13. lung texture