A cavity bounded by the ribs and diaphragm is called:
Correct answer: B. Thoracic cavity
- A. Abdominal cavity
- B. Thoracic cavity
- C. Pelvic cavity
- D. Pleural cavity
Explanation
The cavity bounded by the ribs and diaphragm is called the thoracic cavity, or chest cavity. It is a large, hollow space that contains the heart, lungs, major blood vessels, and other important structures of the respiratory and cardiovascular systems. The thoracic cavity is separated from the abdominal cavity by the diaphragm, which is a thin sheet of muscle that helps to control breathing by contracting and relaxing.
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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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