20,345
edits
Changes
→Lungs
The [[lung]]s must be able to [[Absorb (Biology)|absorb]] [[Oxygen]] into the [[blood]] and release [[Carbon Dioxide]] from the [[blood]] back into the [[lung]]s.
: The [[lung]]s are [[Adaptation|adapted]] with thousands of [[alveoli]] which increase the surface area of the [[lung]]s.
: The walls of the [[alveoli]] separating the [[air]] from the of [[blood]] are very thin.
: The [[blood]] supply to the [[lung]]s is very good to constantly supply [[blood]] with little [[Oxygen]] and a lot of [[Carbon Dioxide]] keeping a high [[Concentration Gradient|concentration gradient]].