Question

Why does CO, diffuse into the blood vessels in the tissue,
but diffuse out of the blood vessels into the alveoli in the lungs?

Answer 1

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The partial pressure of oxygen is high in the alveoli and low in the blood of the pulmonary capillaries. As a result, oxygen diffuses across the respiratory membrane from the alveoli into the blood. ... Therefore, carbon dioxide diffuses across the respiratory membrane from the blood into the alveoli.

Explanation:

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Answer 2

Answer:

The partial pressure of oxygen is high in the alveoli and low in the blood of the pulmonary capillaries. As a result, oxygen diffuses across the respiratory membrane from the alveoli into the blood. ... Therefore, carbon dioxide diffuses across the respiratory membrane from the blood into the alveoli.