Speaking of science
We know about how people donate their body after death to hospitals and health research centres for possible use of the healthy organs to the needy ones. And a very common such donation is the cornea of the eye. But even when one is alive, he/she can donate blood. Many cities across India have what are called ‘blood banks’, where blood gathered by donation from blood donors is saved and preserved for later use in blood transfusion.
How much blood can one donate? Blood in a healthy human body is about 7% of the total body weight (the average body weight being 55-65 kg), or 4.7 to 5.5 litres (1.2 to 1.5 gallons).
