Respiration. Definitions. Breathing(ventilation)- process of moving air into and out of the lungs. Two phases- Inspiration(inhalation) into lungs Expiration(exhalation) out of lungs. Air. Inspired Expired Oxygen21%16% Carbon dioxide0.04%4%
After O2 diffuses across the respiratory membrane into the blood approx. 98.5% of the O2 combines irreversibly with the haemoglobin, becoming oxyhaemoglobin.
Approx. 1.5% remains dissolved in the plasma.