| http://www.w3.org/ns/prov#value | - ? ??? albumin the most abundant protein in plasma ??? ??? ??? vein Blood vessels carrying blood to the heart, except for the pulmonary veins, which carry oxygenated blood. ??? ??? ??? endothelium the layer of epithelial cells that lines the cavities of the heart, blood and lymph vessels ??? ??? ??? venule a tiny vein that drains blood from capillaries ??? ??? ??? carotid Major artery in the neck l
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