...OXYGEN!The purpose of the pulmonary system is GAS EXCHANGE--in with the good, out with the bad. Oxygen truly is the elixir of life.
It wasn't always that way; we have photosynthetic bacteria to thank for this element without which life as we know could not exist. As we consider the physiology and pathophysiology of the body, always LOOK FOR THE OXYGEN...cherchez le O2!
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