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Medical Dictionary

blood

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noun \ˈbləd\

Medical Definition of blood

  1. 1:  the fluid that circulates in the heart, arteries, capillaries, and veins of a vertebrate animal carrying nourishment and oxygen to and bringing away waste products from all parts of the body

  2. 2:  a fluid of an invertebrate comparable to blood

  3. 3:  blood regarded in medieval physiology as one of the four humors and believed to be the seat of the emotions

  4. 4:  descent from parents of recognized breed or pedigree





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