How oxygen enters in blood from alveoli of lungs?

Pressure of

C O_{2}

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Simple diffusion

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By Haemoglobin

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None of the above

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Solution

The correct option is B Simple diffusion
Gas exchange between the air within the alveoli and the pulmonary capillaries occurs by diffusion. The oxygen must first dissolve before passing through the respiratory epithelium. Gas moves from a region of high partial pressure to a region of low partial pressure, down a partial pressure gradient.

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The process by which CO2 moves from the blood to alveoli

Which of these explain(s) the diffusion of oxygen from alveoli to blood?

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