Reading Checks (Page 339)
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5 terms
Terms | Definitions |
|---|---|
 When is the air pressure in the lungs less than the air pressure outside the body? | When you inhale. |
| When is the air pressure in the lungs greater than the air pressure outside the body? | When you exhale. |
| What is the function of the diaphragm? | A sheet of muscle in the lower chest that moves downward as you breathe in. |
| What are the two causes of swelling within the respiratory system? | Bacteria, viruses, and other micro-organisms. Also breathing in smoke, polluted air, coal dust and asbestos. |
| What happens in an asthma attack? | The pathway to the lungs becomes too narrow, making it difficult to breathe. |
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