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Capillaries are the site of diffusion of materials between the body tissues and the blood stream. These materials include nutrients, oxygen, and wastes.
capillaries is where the exchange of materials occur such as; gases,nutrients, hormones, and so on.between the blood and the interstitial fluid.
Capillary: A tiny blood vessel where substances are exchanged between the blood and the body cells.
why do capillaries permit the diffusion of materials, whereas arteries and veins do not? Because the capillaries are the only blood vessels whose walls are thin enough to permit exchanges between the blood and the surrounding interstitial fluid
In the tiny capillary, interstitial fluid enters into the tissue, delivering nutrients, some white blood cells, and other various materials to the tissues. Red blood cells have a similar role, releasing oxygen and taking in carbon dioxide before entering the venule and beginning its journey to the heart once again.
Blood flows slowly through capillaries. This speed allows for increased efficiency of diffusion of materials.
The wall of a capillary is extremely thin.
The human circulatory system consists of arteries, veins, and capillaries. The capillaries are the thin-walled vessels that connect arteries and veins and allow for the exchange of materials between blood and tissue fluid.
capillaries
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peritubular capillaries
exchage of materials between blood and tissues occur in cappilaries.