Question

why why does oxygen diffuse into the blood from an Alveolus in lungs? ​

Answer 1

Explanation:

The partial pressure on of oxygen is high in the alveoli

and low in blood of pulmonary capillaries .As a result

oxygen diffuses across the respiratory membrane from the alveoli into the blood . In the contrast the partial pressure of co2 is high in the capillaries and low in alveoli