NCIt definition : Tiny blood vessels that connect the arterioles with the venules.;
Alternative definition : NCI-GLOSS: The smallest type of blood vessel. A capillary connects an arteriole (small
artery) to a venule (small vein) to form a network of blood vessels in almost all
parts of the body. The wall of a capillary is thin and leaky, and capillaries are
involved in the exchange of fluids and gases between tissues and the blood.; UBERON: Any of the smallest blood vessels connecting arterioles with venules.;