The walls of capillaries are made of one cell cell layer so it is a small diffusion barier. They have the greatest total cross-sectional area and the slowest velocity of blood flow. This enhances exchange.
capillary walls are very thin because they need to be able to diffuse substances readily. The walls are made up of a single layer of cells known as endothelial cells.
Capillary wall.
The wall of a capillary is extremely thin.
The capillary cell wall receives blood from the interstitial fluid.
Capillary walls receive oxygen in the lungs by a process known as diffusion.
Epithelial Tissues?
Capillary exchange play an important role in homeostasis, it involve the processes of that moves materials across typical capillary wall like diffusion, filtration and reabsorption.
Capillaries do not vary in thickness, they are very thin. The thin wall permits the exchange between the blood in the capillary and the adjacent tissue cells.
A capillary has a very narrow lumn and very thin wall. These features maximize diffusion of nutrients, wastes, and oxygen.
Slow flow speed in the capillary increases the efficiency of diffusion. In addition, the thin wall of the capillary helps substances to pass through efficiently.
Capillary
Capillaries have very thin walls which are semi-permeable.
Villi
Diffusion