eupnea definition medical
From Wikipedia, the free encyclopedia. In the human respiratory system, eupnea or eupnoea (Greek eupnoia; from eu, well + pnoia, breath) is normal, good, unlabored ventilation, sometimes known as quiet breathing or resting respiratory rate. In eupnea, expiration employs only the elastic recoil of the lungs. Eupnea is the natural breathing in all mammals, including humans.