Question

Which gas passes into the blood from the alveoli? And which gas passes out of the blood into the alveoli? Please help me

Answer 1

Oxygen passes through the alveoli into the blood and carbon dioxide passes out of the blood into the alveoli

Answer 2

Oxygen passes quickly through this air-blood barrier into the blood in the capillaries. Similarly, carbon dioxide passes from the blood into the alveoli and is then exhaled