Question

PATHWAY OF AIR FLOW DURING BREATHING



Trace the pathway of anatomical structures through which a molecule of oxygen would pass as it enters the body through the nostrils and travels down to an alveolus in the lungs.

Answer 1

Air first enters the body through the mouth or nose, quickly moves to the pharynx (throat), passes through the larynx (voice box), enters the trachea, which branches into a left and right bronchus within the lungs and further divides into smaller and smaller branches called bronchioles.

Answer 2

Passage of air into the lungs. Air enters the body and is warmed as it travels through the mouth and nose. The trachea divides into two bronchi. ... At the end of the bronchioles, the air enters one of the many millions of alveoli where gaseous exchange takes place