When giving blood, usually 1 pint.....how does your body know it's gone? Then how much to remake? When you fill a balloon with water and tie it off, if you take a pint from it there is no way to refill it. Nor does it know. So how does our heart know to produce blood or not? and How much?
2007-11-01 12:08:22 · 2 answers · asked by WAIGHT 4 in Science & Mathematics ➔ Biology
Blood is produced in the bone marrow, not in the heart. Like every biological system, it knows when it needs more white blood cells ( to fight infection ) or when it's low and needs to make more. It's all done through chemical and osmotic processes.
2007-11-01 12:17:14 · answer #1 · answered by dude 7 · 0⤊ 0⤋
it reproduced. if you want to know the blood is gone you wouldn't be felling anything and face or hand will grow. there are cells to reproduce when they reproduce they grow. like one of the cell makes two more cell.
2007-11-01 19:27:01 · answer #2 · answered by Anonymous · 0⤊ 1⤋