The structure of a capillary is:
Capillaries are tiny (extremely narrow) blood vessels, of approximately 5-20 micro-metres (one micro-metre = 0.000001metre) diameter.
The functions of capillaries include:
- To supply tissues with components of, and carried by, the blood, and also to remove waste from the surrounding cells - as opposed to simply moving the blood around the body, in the case of other blood vessels.
- The exchange of oxygen, carbon dioxide, water, salts, etc., between the blood and the surrounding body tissues.
For more information about blood vessels and the components (sometimes called the 'constituents') of blood see the pages about the the structure and functions of blood vessels and the structure and functions of blood. This might interest students of holistic massage, reflexology, beauty therapies, or health-related courses.