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ElenaW [278]
3 years ago
7

Gas exchange, the lungs' main and vital function, takes place in the

Medicine
1 answer:
velikii [3]3 years ago
6 0

Answer:

d. alveoli

Explanation:

Alveoli -

It is an important and crucial part of the respiratory system , the main function of alveoli is the exchange of gases ,

The structure of Alveoli is a balloon shaped air sacs , which are present in the terminating end of the bronchial branches  .

The thickness of alveoli is only one cell thick , whihc allows the exchange of gases .

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