In the human respiratory tract, temperature and humidity of the inhaled air increases in the
Correct answer: C. Nasal cavity
- A. Trachea
- B. Bronchi
- C. Nasal cavity
- D. Alveolar space
Explanation
The correct answer is the nasal cavity. The nasal cavity is lined with mucous membranes and has a rich blood supply which helps to warm and humidify the air as it is inhaled. The trachea and bronchi serve primarily as passageways for air to reach the lungs, while the alveoli are involved in gas exchange rather than conditioning the air. By the time air reaches the alveoli, it has already been warmed and humidified.
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About Human Respiratory System
The human respiratory system conducts air to the alveoli, where oxygen and carbon dioxide exchange occurs across thin respiratory surfaces. Questions cover the nasal passage, trachea, bronchi, lungs, diaphragm and intercostal muscles, ventilation mechanics and gas transport, while distinguishing breathing and gaseous exchange from cellular respiration.
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