Question

alveoli are microscopic air sacs in the lungs of mammals. which statement best describes how the structure of alveoli allows lungs to function properly? they increase the surface areas of the lungs, allowing efficient gas exchange. they increase the volume of the lungs, allowing more oxygen to be inhaled. they increase the flexibility of the lungs as they expand during inhalation. they increase the amount of energy transferred from the lungs to the blood.

Explanation:

Alveoli are tiny air - sacs in lungs. Their large number and structure create a large surface area. Gas exchange (oxygen and carbon - dioxide) between air in alveoli and blood in capillaries occurs across this surface. A larger surface area allows for more efficient gas exchange.

Answer:

They increase the surface areas of the lungs, allowing efficient gas exchange.