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How does the nose warm and moisten inhaled air?
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human respiratory system
The lungs serve as the gas-exchanging organ for the process of respiration.
The nose conditions inhaled air by warming and moistening it as it passes through the nasal cavity, ensuring the air is prepared for contact with the delicate tissues of the gas-exchange area in the lungs.1
This process is facilitated by the specialized respiratory mucosa that lines the nasal cavity. This lining contains:
- Venous plexuses: These networks of blood vessels help warm the incoming air as it flows through the nasal passages.1
- Mucus-secreting glands: These glands produce mucus, which adds necessary moisture to the air.21
The complex structure of the nasal cavity, which includes bony ridges known as nasal conchae, increases the surface area available for this conditioning process to occur efficiently. By the time the air reaches the lower respiratory tract, it has been effectively filtered, warmed, and humidified.21