system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: How does the circulatory system handle/adapt to the loss of an extremity or limb creating apparent dead ends in the veins?

It doesn't seem like the blood would be able to circle back to the heart anymore if you lost an arm or something similar.  Do doctors have to rewire the veins somehow?
gpt
Veins don't connect to arteries.  Both connect to capillaries.  When the limb is cut off, the veins and arteries running to the cut off part are capped off at the stump (to use a plumbing term rather than a more medical non-ELI5 term).  The blood is distributed to the capillaries in the remainder of the body, and the artery -> capillary -> vein loop is preserved.