Question

why partial pressure of oxygen is high in atmosphere than alveolar pressure?​

Answer 1

Answer:

Partial pressures

The alveolar oxygen partial pressure is lower than the atmospheric O2 partial pressure for two reasons. ... The rest of the difference is due to the continual uptake of oxygen by the pulmonary capillaries, and the continual diffusion of CO2 out of the capillaries into the alveoli.

Answer 2

• Partial pressures

The alveolar oxygen partial pressure is lower than the atmospheric O2 partial pressure for two reasons. ... The rest of the difference is due to the continual uptake of oxygen by the pulmonary capillaries, and the continual diffusion of CO2 out of the capillaries into the alveoli.