In the lungs, is carbon dioxide more concentrated in the alveoli or in the blood?

1 Answer
Mohan M.
Nov 7, 2016

Carbon dioxide is always carried in the blood. During expiration it is released in alveoli.

Explanation:

Carbon dioxide is always carried in blood. From blood it is released in alveolar air during expiration.
Transport of oxygen and carbon dioxide follows gas laws.
Respiratory gases move from higher concentration to lower concentration. In alveolar air when carbon dioxide is less from blood carbon dioxide is released.

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