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The tendency of aging men to have difficulty urinating is most commonly linked to
Oxygen
A chemical element essential for life, necessary for cellular respiration in most organisms, and a major component of Earth's atmosphere.
Carbon Dioxide
A colorless, odorless gas produced by burning carbon and organic compounds and by respiration, considered a greenhouse gas.
Alveoli
Small, air-filled sacs in the lungs where gas exchange between the air and blood takes place.
Inhaled Air
The mixture of gases that is taken into the lungs during the act of breathing, primarily comprised of nitrogen, oxygen, carbon dioxide, and water vapor.
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