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Pulmonary ventilation

The exchange of air between the atmosphere and the air sacs of the lungs.


Air enters the body through these.


Is a subjective feeling of difficult or labored breathing.


The movement of molecules from an area in which they are in higher concentration to an area in which they are in lower concentration.

Vital capacity

The volume of air that remains in the lungs after maximum exhalation.

Nasal Septum

This seperates the nose into two portions.


The superior portion of the nose, located behind the nasal cavity.


Commonly called the voice box.

Vocal cords

These vibrate as air flows over them from the lungs.


A leaf-shaped cartilage that covers the larynx during swallowing.


commonly called the windpipe


The space between the lungs, including the esophagus, trachea, and lymph nodes.


A muscular partition in the abdominal cavity.


Inspiration, the drawing of air into the lungs.


Expiration, the expulsion of air from the lungs.


The ease with which one can expand the lungs and thorax.


A temporary cessation of breathing.

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