Why and how do we breathe?

Essay specific features

 

Issue:

Science

 

Written by:

James K

 

Date added:

April 4, 2014

 

Level:

University

 

Grade:

B

 

No of pages / words:

4 / 879

 

Was viewed:

8833 times

 

Rating of current essay:

 
Essay content:

This is called inhalation. Exhalation is caused by the relaxation of the diaphragm, which decreases the volume in the chest cavity and increases the air pressure. This causes air to rush out. Air passes the nostrils and enters the nasal passages where it is warmed, moistened and filtered, by the hairs, mucous, and blood vessels, which line the passages...
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Hairs collect dust and germs, mucous moistens the air, and the blood vessels warm the air. The pharynx is the next structure the air comes in contact with, then larynx (voice box). Air passes the vocal chords and the epiglottis. From there its to the trachea, which branches out into the left and right bronchial tubes, which each branch out and become smaller and smaller...
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