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masha68 [24]
3 years ago
7

The alveoli are surrounded by __________ carrying blood to and from the heart.

Chemistry
1 answer:
natka813 [3]3 years ago
4 0
The alveoli are surrounded<span> by tiny blood vessels, called capillaries. The </span>alveoli<span> and capillaries both have very thin walls, which allow the oxygen to pass from the </span>alveoli<span>to the blood. The capillaries then connect to larger blood vessels, called veins, which bring the oxygenated blood from the lungs to the heart.</span>
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