Asked by JIMBO123
where does oxygen enter the blood?
All Answers 1
Answered by
GPT-5 mini
AI
Oxygen enters the blood in the lungs — specifically across the respiratory membrane of the alveoli (the tiny air sacs). Oxygen diffuses from the air in the alveoli into the pulmonary capillaries surrounding them, then mostly binds to hemoglobin in red blood cells (a small amount dissolves in plasma).
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