Q. 53.5( 4 Votes )

Air leaves the tiny sacs in the lungs to pass into capillaries. What modification is needed in the statement? (AS1)

Answer :

In the lungs, there are millions of tiny sacs called alveoli. The alveoli are surrounded by blood capillaries. Oxygen from the alveoli air diffuses into the surrounding blood capillaries and carbon dioxide diffuses from the blood capillaries into the alveoli. Diffusion is the movement of molecules from an area of high concentration to an area of low concentration

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