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dragon's blood

(Encyclopedia)dragon's blood, name for a red resin obtained from a number of different plants. It was held by early Greeks, Romans, and Arabs to have medicinal properties; Dioscorides and other early writers descri...

Blood Blackfoot

(Encyclopedia)Blood Blackfoot: see Blackfoot.

blood feud

(Encyclopedia)blood feud: see vendetta.

blood poisoning

(Encyclopedia)blood poisoning: see septicemia. ...

red blood cell

(Encyclopedia)red blood cell: see blood.

white blood cell

(Encyclopedia)white blood cell: see blood.

high blood pressure

(Encyclopedia)high blood pressure: see hypertension. ...

Drew, Charles Richard

(Encyclopedia)Drew, Charles Richard, 1904–50, African-American physician, b. Washington, D.C. A surgeon and a professor at Howard Univ. (1935–36; 1942–50), he developed a means of preserving blood plasma for ...

injection

(Encyclopedia)injection, introduction of a fluid into the body, usually by means of a needle and syringe. The material injected may be a test substance (as in determining allergic sensitivity or immunity to a disea...

shock

(Encyclopedia)shock, any condition in which the circulatory system is unable to provide adequate circulation to the body tissues, also called circulatory failure or circulatory collapse. Shock results in the slowin...