Question

Why are the lung alveoli covered with blood capillaries?

Answer 1

Answer:

This helps the transport of oxygen to all the cells of our body through blood

Explanation:

When oxygen is pumped into our lungs it goes to alveoli, alveoli is covered with branches of blood vessels which absorp the enhaled oxygen and transport it to all the cells of all the parts of our body.

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Answer 2

Answer:

Alveoli present in the lungs are covered with blood capillaries so that the exchange of gases can take place between the membranes of the alveoli and the surrounding capillaries. ... This allows oxygen to diffuse into the blood and carbon dioxide to diffuse out of the blood.