Question

presence arge number of alveoli around
alveolarductss opening into bronchioles in
Presence ofmammalin lung makes :
vient system of ventilation with little of
(1) Inefficient system of ventilation with little
residual air
(2) An efficientresidual airefficient system of ventilation with little
(3) An efficient system of ventilation with no
residual air
(4) An efficient system of ventilation with high
percentage of residual air
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Answer 1

Answer:

lungs

blood takes oxygen through alveoli