Pressure inside the chest cavity is reduced by:
Correct answer: D. Downward movement of the diaphragm and upward movement of ribs
- A. Downward movement of diaphragm
- B. Upward movement of diaphragm
- C. Upward movement of the ribs
- D. Downward movement of the diaphragm and upward movement of ribs
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About Respiration
The human respiratory system includes the air passages, lungs, alveoli and breathing muscles, while gaseous exchange explains how oxygen enters blood and carbon dioxide leaves it by diffusion. The effects of smoking include damage to cilia and alveoli, reduced gas exchange, chronic bronchitis, emphysema and increased risk of lung cancer.
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