The Human Respiratory System

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Across
  1. 4. the voice box
  2. 5. is the primary dome-shaped muscle separating the chest and abdomen
  3. 6. tiny air sacs in the lungs at the end of the bronchiole tubes
  4. 8. breathing entry for oxygen and exits carbon dioxide
Down
  1. 1. 2 tubes that go through your windpipe and into your lungs
  2. 2. moves air between your larynx and your lungs
  3. 3. are tiny, muscular airways in the lungs
  4. 7. better known as Chronic Obstructive Pulmonary Disease