eli5: If your leg gets amputated, how does your body know to not produce enough blood to replace what was lost?

Question

eli5: If your leg gets amputated, how does your body know to not produce enough blood to replace what was lost?

In: 2195

Answer 1

Baroreceptors in various locations around the body, they sense the pressure being exerted on the vessels and send that information to the brain, the brain then sends it to the kidneys to excrete or retain fluid.

But there’s alot more to it than this simple explanation.