How blood in lungs oxygenated ?
answer The oxygen taken from the atmosphere reaches to the air sac of lungs through nose, wind pipe, bronchus. Air sacs are covered with the net of blood capillaries. The oxygen present in the air sac goes to the blood capillaries by diffusion whereas the carbon dioxide gas present in the blood capillaries goes to air sac. The oxygenated blood reaches the heart. The heart takes that oxygenated blood through different types of pipes to different parts of the cell of our body.
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Each air sac is surrounded by a network of fine blood vessels (capillaries). The oxygen in inhaled air passes across the thin lining of the air sacs and into the blood vessels. This is known as diffusion. The oxygen in the blood is then carried around the body in the bloodstream, reaching every cell.
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