Answer:
b
Explanation:
Internal respiration is the process of diffusing oxygen from the blood, into the interstitial fluid and into the cells.
Exchange of gases between the blood and body's cells is called internal respiration.
The exchange of gases (as oxygen and carbon dioxide) between the cells of the body and the blood by way of the fluid bathing the cells.
Internal respiration occurs in the body tissues, where cells release carbon dioxide and take in oxygen from the blood.
Hence, B is correct option
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