Doctors Gunther von Hagens and John Heyworth examine the effect of severe blood loss. The human circulatory system contains about 5 litres of blood. The heart pumps 7500 litres of blood around the body every day. Dr Heyworth explains how a haemorrhage is treated according to where the blood loss occurs. Gunther begins by explaining how much blood is lost from a cut to the finger tip - 11 drops in 15 seconds. The vessel at the base of the finger is larger. The digital artery
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