IV . Respiratory Physiology A. Purpose is to supply body and cells with oxygen and remove CO2 produced through cellular activities B. Pulmonary Ventilation - Processes involved:. http://www.emptynosesyndrome.org/pics/image-res003.jpg. 1. INSPIRATION
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IV. Respiratory Physiology
A. Purpose is to supply body and cells with oxygen and remove CO2 produced through cellular activities
B. Pulmonary Ventilation - Processes involved:
a. Occurs when alveolar pressure falls below atmospheric pressure
b. Contraction of the diaphragm and external intercostal muscles increase the volume in the thorax so the lungs expand
c. Expansion of the lungs decreases alveolar pressure so air moves along the pressure gradient from the atmosphere (high pressure) into the lungs (low pressure)
d. During forced inspiration accessory muscles of respiration are used.
Gas exchange animationhttp://www.nlm.nih.gov/medlineplus/ency/images/ency/fullsize/19589.jpg