Question

WHY LUNG ALVEOLI ARE COVERED WITH BLOOD CAPILLARIES?

Answer 1

So that the exchange of gases can take place between the membranes of the alveoli and the surrounding capillaries.

Answer 2

Hi friend,
Alveoli covered with blood capillaries so that the exchanges of gases taken place between the memberance of alveoli and the surrounding capillaries. The blood capillaries covering alveoli have a low oxigen and high co2 concentration. This allow o2 to diffuse into the blood and co2 diffuse out of the blood
....i hope it helps you

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