Respiratory System

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Across
  1. 3. carbon dioxide and oxygen swap spots from the capillaries into the aveoli
  2. 5. breathing in oxygen
  3. 8. small air sacs at the end of each bronchiole
  4. 9. tubes that lead to the left and right lung
  5. 10. narrow airways that branch out from the bronchi
Down
  1. 1. diaphragm relaxes against the lungs and carbon dioxide exits through the mouth or nose
  2. 2. tube lined with ring-shaped pieces of cartilage
  3. 4. tiny blood vessels that wrap the alveoli
  4. 6. muscle below the lungs that separates the chest and abdomen and helps you breathe
  5. 7. very small hairs inside that collect dust or unwanted particles that come in with the air