Changes

'''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.

<center>For lessons on the [[topic]] of '''''[[Breath]]''''', follow [http://nordan.daynal.org/wiki/index.php?title=Category:Breath this link].</center>

<center>For lessons on the [[topic]] of '''''[[Breath]]''''', follow [https://nordan.daynal.org/wiki/index.php?title=Category:Breath this link].</center>

==Gas exchange==

==Gas exchange==