GENERAL HISTOLOGY

Detailed explanation-1: -The alveoli are thin-walled and richly supplied with a network of blood vessels to facilitate the exchange of gases between blood in the capillaries and the air inside the alveoli. These alveoli are balloon-like structures which provide the maximum surface area for the exchange of gases.

Detailed explanation-2: -Alveoli have thin walls and a close network of blood arteries to allow gas exchange between blood and air-filled alveoli. They have a balloon-like structure to maximize surface area in exchange for gas.

Detailed explanation-3: -Answer and Explanation: The walls of alveoli are only one cell in thickness, which is the reason that they are able to perform gas exchange. Gas exchange is the movement of oxygen and carbon dioxide through the walls of the alveoli and neighboring blood vessels called ‘capillaries’, by the process of diffusion.

Detailed explanation-4: -Each alveolus is cup-shaped with very thin walls. It’s surrounded by networks of blood vessels called capillaries that also have thin walls. The oxygen you breathe in diffuses through the alveoli and the capillaries into the blood.