The gas contents of inhaled air and exhaled air are different because inhaled air is oxygen while exhaled air is carbon dioxide.
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Inhaled air contains more oxygen and less carbon dioxide exahaled air.
Exhaled air contains more carbon dioxide produced as a waste product of energy working together and less oxygen as it has been used in breathing.
Obesity <span>is the most significant public health issue facing people in the U.S. today. The other categories has a low frequency to occur than Obesity.</span>
