Question

How are the alveoli designed to maximise the exchange of gases?

Answer 1

1. They are circular in shape, which increases surface area for exchange of gases.

2. They have a extensive network of fine blood capillaries to facilitate the exchange of gases.

Answer 2

it provides a better surface for the exchange the presence of the gas and it has extensive network of blood vessels which found in the alveoli wall .

It sucked the air into the part of the lungs and also alveoli evenly with no risk and problem.

Here the oxygen from the breath into the blood and CO2 from the part of the blood brought from the total body and diffuses out in to the air.