by 
Max Power
ANSWERS: 3
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It all started when it was thought that there was bad blood traveling through ones circulitory tract. This idea, which caused a dangorous practice, spurred the idea that when a person is sick there must be bad blood in the system. The only way to get rid of the "bad" blood was to bleed them. A slit was made, I pretty sure it was the arm, and a collection bowl was put underneath the arm. This was a common practice and leeches, which live in water and suck blood, were often put on the patients arm instead. Many people died because of this and George Washington died because of bloodletting. Today, in modern medicine, we know that diseases are carried through the bloodstream but instead of bleeding someone doctors give them antibiotics etc.
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Bloodletting (or blood-letting, in modern medicine referred to as phlebotomy) was a popular medical practice from antiquity up to the late 19th century, involving the withdrawal of often considerable quantities of blood from a patient in the hopeful belief that this would cure or prevent a great many illnesses and diseases. The practice, of unproven efficacy, has been abandoned for all except a few specific conditions as modern treatments proved or believed to be effective have been introduced. It is conceivable that historically, in the absence of other treatments for hypertension, bloodletting could sometimes have had a beneficial effect in temporarily reducing blood pressure by a reduction in blood volume. Today the term "phlebotomy" refers to the drawing of blood for laboratory analysis or blood transfusion (see Phlebotomy (modern)). Therapeutic phlebotomy refers to the drawing of a unit of blood in specific cases like hemochromatosis, polycythemia vera, porphyria cutanea tarda etc., to reduce the amount of red blood cells. Hope I Helped For more info go to http://en.wikipedia.org/wiki/Bloodletting!
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i have no fu**ing clue
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