Skip to Content
Medical Term:


Pronunciation: blŭd

Definition: The “circulating tissue” of the body; the fluid and its suspended formed elements that are circulated through the heart, arteries, capillaries, and veins; blood is the means by which 1) oxygen and nutritive materials are transported to the tissues, and 2) carbon dioxide and various metabolic products are removed for excretion. Blood consists of a pale yellow or gray-yellow fluid, plasma, in which are suspended red blood cells (erythrocytes), white blood cells (leukocytes), and platelets.

Synonym(s): haemaTA

[A.S. blōd]

See Also: arterial blood, venous blood

© Copyright 2016 Wolters Kluwer. All Rights Reserved. Review Date: Sep 19, 2016.