Blood is a constantly circulating fluid in the body that carries substances such as nutrients and oxygen to the cells and transports waste products away. Blood is composed of formed elements (erythrocytes, leukocytes, and platelets) suspended in blood plasma, which contains 7% proteins and 93% water with dissolved minerals, nutrients, and wastes. The physiology of blood involves discussion of a variety of subjects including the production and degradation of blood cells, oxygen transport, carbon dioxide transport, thermoregulation and pH balance.
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Conceptual Vocabulary for Blood