Question

lo 4.2. what is the function of the capillaries surrounding the alveoli?
regulate blood pressure in the lungs
increase surface area for gas exchange
protect the alveoli from infection
facilitate gas exchange
transport nutrients to the alveoli

Explanation:

Alveoli are tiny air sacs in the lungs. Capillaries around them have thin walls. Oxygen from alveoli diffuses into capillaries' blood. Carbon dioxide from blood diffuses into alveoli. This is gas exchange. Capillaries' main role here is to facilitate this gas - exchange process.

Answer:

Facilitate gas exchange