do all these take involve external respiration? and which ones don't or do they all?

1 hemoglobin binds to oxygen to form ox-hemoglobin

2 hemoglobin releases carbon dioxide

3 carbon dioxide diffuses into the alveoli

4 carbonic acid dissociates into water and carbon dioxide

5 exchange of gases between capillaries and alveoli

6 partial pressure of oxygen is greater in the alveoli than capillaries

7 involves the pulmonary circuit

8 oxygen diffuses into capillaries


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