alveoli are surrounded by...\nveins to directly interact with blood.\narteries and veins to directly…

Brief Explanations:

Alveoli are tiny air - sacs in the lungs where gas exchange occurs. They are surrounded by a network of capillaries which allows for the diffusion of oxygen into the blood and carbon dioxide out of the blood. Capillaries are the smallest blood vessels and provide a large surface area for efficient gas exchange.

Answer:

capillaries to directly interact with blood.