I gave my 112th blood donation today.
They take half a litre every 56 days.
Someone asked me, “Is that a pump? Are they pumping it out of you?” No! It’s not a pump! It’s just a bag of blood sitting on a platform that moves back and forth every few seconds to stop the blood from coagulating, or whatever blood does when it sits still. The heart is a pump. It pumps it all around; and if you put a hole in a vein and let it out into a bag, your heart doesn’t know the difference. It just gets pumped out. No biggie.