Buy custom Effects Of Altitude On Human Physiology
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| Topic: |
Science
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| Number of pages / Number of words: |
14 / 3819 |
Essay's paper body
At the base of the pharynx are
two openings. One, the esophagus, leads to the digestive system while the other, the glottis, leads
to the lungs. The epiglottis covers the glottis when swallowing so that food does not enter the
lungs. When the epiglottis is not covering the opening to the lungs air may pass freely into and out
of the trachea...
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Once in the lung the bronchi branch many times into smaller bronchioles which eventually
terminate in small sacs called alveoli. It is in the alveoli that the actual transfer of oxygen to the
blood takes place.
The alveoli are shaped like inflated sacs and exchange gas through a membrane. The passage of
oxygen into the blood and carbon dioxide out of the blood is dependent on three major factors:
1) the partial pressure of the gases, 2) the area of the pulmonary surface, and 3) the thickness of
the membrane (Gerking, 1969)...
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