Exper-iation....meaning breathing in and out, you have two kinds of the nerve system, 1) voluntary nerve system, or 2) involuntary nerve system, to that which its always from the central, spine, anyway...its CNS, stands for Central Nerve System

Middle School, or your physiology at least that English words, es, or as....not aspiration. expiration, 

expire....looking same. The sounding that word meaning you have a ...sweat mechanism through your skin gland, to tell that when your heart pump, or your body has a heated response, your heart rate, your breathing rate will increase.

Your medical equipment.