Which statement is NOT true about the human respiratory system?
A. The glottis is closed by the forward movement of the soft palate during swallowing.
B. Food and air both enter the pharynx, presenting a potential danger to respiration.
C. The glottis is the passageway through the larynx by which air enters the trachea.
D. Air reaching the lungs has been warmed to body temperature by passage through the nose and upper respiratory passageways.
E. Cilia and hairs in the nose help to filter out foreign materials in the air.
Answer: A
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