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10 December, 07:06

What part of the respiratory system is composed of a single layer of epithelial tissues surrounded by a network of capillaries? a. alveoli b. trachea c. bronchiole

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  1. 10 December, 07:43
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    I think the correct answer from the choices listed above is option A. It is the alveoli that is composed of single layer surrounded by a network of capillaries. These are used to allow oxygen and carbon dioxide to move from the lungs to the bloodstream.
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