capillary (kăp`əlĕr'ē), microscopic blood vessel, smallest unit of the circulatory system circulatory system, group of organs that transport blood and the substances it carries to and from all parts of the body. The circulatory system can be considered as composed of two parts: the systemic circulation, which serves the body as a whole except for the
..... Click the link for more information. . Capillaries form a network of tiny tubes throughout the body, connecting arterioles (smallest arteries artery, blood vessel that conveys blood away from the heart . Except for the pulmonary artery, which carries deoxygenated blood from the heart to the lungs, arteries carry oxygenated blood from the heart to the tissues.
..... Click the link for more information. ) and venules (smallest veins vein, blood vessel that returns blood to the heart . Except for the pulmonary vein, which carries oxygenated blood from the lungs to the heart, veins carry deoxygenated blood. The oxygen-depleted blood passes from the capillaries to the venules (small veins).
..... Click the link for more information. ). Through the thin capillary walls, which are composed of a single layer of cells, the nutritive material and oxygen in the blood pass into the body tissues, and waste matter and carbon dioxide in turn are absorbed from the tissues into the bloodstream.

capillary

Any of the minute blood vessels that form networks where the arterial and venous circulation (see artery, vein) meet for exchange of oxygen, nutrients, and wastes with body tissues. Capillaries are just large enough for red blood cells to pass through in single file. Their thin walls are semipermeable, allowing small molecules to pass through in both directions. The smallest lymphatic vessels and minute bile channels in the liver are also called capillaries.

capillary (redirected from lymph capillary)

capillary

capillary
(redirected from lymph capillary)