Absorption of O₂ from blood and release of CO₂ from tissue cells is known as A)external respiration. B)internal respiration. C)pulmonary ventilation. D)gas diffusion. E)alveolar ventilation.

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Internal respiration involves the exchange of gases (oxygen and carbon dioxide) between the blood and the tissue cells. This process occurs at the cellular level and is distinct from external respiration, which involves the exchange of gases between the air and blood in the lungs. Pulmonary ventilation refers to the movement of air into and out of the lungs, while gas diffusion refers to the movement of gases across a membrane (such as the alveolar-capillary membrane). Alveolar ventilation is the amount of air that reaches the alveoli (the tiny air sacs in the lungs) per minute.

Absorption of O2 from Blood and Release of CO2 from Tissue

Absorption of O₂ from Blood and Release of CO₂ from Tissue