1) (a) what happens to the volume of the lungs when they expand? (b) Explain why air is sucked into the lungs (need to explain about the gas pressure)

PLS HELP THXX A LOTT
the topic is related to gas presssure
thx soo much for helping

Although respiratory organs vary across different organisms, they all contain respiratory surfaces that have a large surface area and are extremely thin. explain why having an extremely thin respiratory surface with a large surface area is advantageous for the process of gas exchange