give the function of network of capillaries on alveoli
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Capillaries are the smallest of the body's blood vessels. They are only one cell thick, and they are the sites of the transfer of oxygen and other nutrients from the bloodstream to other tissues in the body; they also collect carbon dioxide waste materials and fluids for return to the veins.
Gas exchange of oxygen and carbon dioxide takes place in the alveoli. Oxygen from the inhaled air diffuses through the walls of the alveoli and adjacent capillaries into the red blood cells. The oxygen is then carried by the blood to the body tissues.
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Explanation:
The function of the capillary network of alveoli:
- • The alveoli are enclosed by tiny blood vessels, termed capillaries.
- • The alveoli and capillaries both have very tinny walls, which let the oxygen to pass from the alveoli to the blood.
- • The capillaries then unite to larger blood vessels, named veins, which carry the oxygenated blood from the lungs to the heart.
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