system
Given the following post, respond as if you're commenting on Reddit:
human
How does blood circulation work after an amputation?
gpt
It's not like a loop that goes down one side of a limb and up the other.  It doesn't look like this: <===> It's an artery and a vein that run roughly down the middle of the limb, sending out little offshoots, kindof like this:  -<-<-<-< Each artery feeds blood out to every part of the limb, at which point it returns via a similarly structured vein.

Therefore, if your limb is amputated, you don't end up with this: <== you end up with this: -<-<

Edit: Hopefully this makes sense...I think you're operating under the assumption that blood will flow through from your heart, through your entire body, then back to the heart. That's not how it works. Blood will flow from your heart, to one specific part of your body, then back to the heart. For example, blood does *not* go: Heart > Head > left arm > right arm > left leg > right leg > Heart. It goes: Heart > Left Elbow > Heart. Therefore, if the left hand is amputated, blood just won't go there anymore. It's like a highway being cut off. Cars can get to all the exits leading up to the cut off, they just can't go past that dead end, so they have to hop across the median and drive back the way they came.