Air Entering the Body is Filtered,warmed,and Humidified by The

Question

Air entering the body is filtered,warmed,and humidified by the
A)upper (conducting)portion of the respiratory tract.
B)lower (respiratory)portion of the respiratory tract.
C)lungs.
D)alveoli.
E)bronchioles.

Accepted Answer

The upper (conducting) portion of the respiratory tract comprises the nose, nasal cavity, pharynx, larynx, and trachea. As air enters the body through the nose, it passes through the nasal cavity, which is lined with tiny hairs (cilia) and mucus-secreting cells. These structures filter out impurities and particles from the air, such as dust, pollen, and bacteria. The air is then warmed and humidified as it continues through the pharynx, larynx, and trachea, helping to prevent irritation and damage to delicate lung tissue.