A unit of blood is equivalent to approximately 1 pint or 450 milliliters, according to the Canadian Blood Services website. The average patient requires around 4.6 units of blood.Know More
The Canadian Blood Services website states that the average person has five liters of blood in his body. Blood donation is of vital importance to medical treatment of thousands of people every year. Blood products or components are used in treating victims of accidents and during surgery. They are also used for cancer treatments and burn therapy. According to BloodConnect, repeated blood transfusions are the only method of treatment available for patients with blood diseases. Examples of such include severe anaemia, blood cancer and thalassemia.