_ begins with the breathing in of air or oxygen.
Respiration Digestion in the throat Expiration Communication Circulation VOCs and NOx transpiration
A B C D E F G H
_ begins with the breathing in of air or oxygen. (A) Respiration (B) Digestion (C) in the throat (D) Expiration (E) Communication (F) Circulation (G) VOCs and NOx (H) transpiration