Home » Biology » Physiology and Anatomy » Breathing Lungs Respiration

Breathing Lungs Respiration

How and why do animals breathe?

Purpose: to bring O2 (oxygen gas) from the atmosphere into the body, so that it can get to the cells.
Why do cells require O2? They use it during cellular respiration to generate energy.

* Cellular respiration

Amazing 3 ways animals breath GIF large


%d bloggers like this: