Presence of large number of alveoli around alveolar ducts opening into – McqOptions

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1.	Presence of large number of alveoli around alveolar ducts opening into bronchioles in mammalian lungs is:
A.	Inefficient system of ventilation with little of residual air.
B.	Inefficient system of ventilation with high percentage of residual air.
C.	An efficient system of ventilation with no residual air.
D.	An efficient system of ventilation with little residual air.
Answer» E.

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