A&P: Respiratory System

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Across
  1. 2. As the bronchi continue to branch, they become smaller
  2. 5. Capillaries Blood vessels release CO2 waste and absorb more O2 from air in the lungs.
  3. 7. A flap of tissue that seals off the windpipe and prevents food from entering.
  4. 9. The windpipe: a large membranous tube reinforced by rings of cartilage, extending from the larynx to the bronchial tubes and conveying air to and from the lungs
  5. 10. The passages that direct air into the lungs
  6. 11. section of the pharynx directly behind the mouth
  7. 12. region of the pharynx below the epiglottis
Down
  1. 1. double-layered membrane surrounding each lung
  2. 3. section of the pharynx directly behind the nasal passages
  3. 4. tiny sacs of lung tissue containing capillaries that exchange gases between air and blood
  4. 6. Large, flat muscle at the bottom of the chest cavity that helps with breathing
  5. 8. muscle between the ribs