'''Breathing''' takes [[oxygen]] in and [[carbon dioxide]] out of the body. [[Aerobic]] organisms require oxygen to create energy via respiration]], in the form of energy-rich [[molecule]]s such as [[glucose]]. The medical term for normal relaxed breathing is eupnea. | '''Breathing''' takes [[oxygen]] in and [[carbon dioxide]] out of the body. [[Aerobic]] organisms require oxygen to create energy via respiration]], in the form of energy-rich [[molecule]]s such as [[glucose]]. The medical term for normal relaxed breathing is eupnea. |