Question

what is alveolar sac?

Answer 1

HELLO DEAR
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HERE IS YOUR ANSWER
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Lung alveoli are the ends of the respiratory tree, branching from either alveolar sacs or alveolarducts, which like alveoli are both sites of gas exchange with the blood as well. Alveoli are particular to mammalian lungs
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Answer 2

lung alvoli are the end of respiratory tree,branching from either alveolar sacs or alveolar ducts, which like alvoli both sites of gas exchange with the blood as well. it also helps In exchangeing of gases