PATHOLOGY

Detailed explanation-1: -Capillaries are the connection of the smallest branches of arteries and veins. The capillary walls are one cell thick. Capillaries allow molecules to pass through across the capillary walls. This exchange of materials is not possible across the walls of other types of blood vessels because the walls are too thick.

Detailed explanation-2: -Capillaries. Found near every living cell of the body. Microscopic – walls are one cell thick, this allows for the diffusion of substances into the cells from the capillaries and out of the cells into the capillaries.

Detailed explanation-3: -What are Capillaries? The capillaries are the smallest blood vessels in the body. Capillaries are 5 to 10 micrometers in diameter and are only one cell wall layer thick. Capillaries are important because they are the site of substance exchange between cells and the blood.