Blood is a living tissue composed of many parts, each of which serves a vital function. Disorders that affect the blood's ability to carry oxygen, nourishment, hormones, antibodies, and many other important compounds to other body tissues can have serious health consequences. Diseases of the veins and arteries may cause damage or blockage in blood vessels, which can lessen blood flow, and diseases of the blood itself can take many forms. Blood and Circulatory Disorders Sourcebook provides information so that the layperson can identify early warning signs of blood and circulatory disorders. It describes common blood and circulatory disorders and provides answers to questions about blood donation and the safety of the blood supply.