system
Given the following post, respond as if you're commenting on Reddit:
human
How do surgeons connect nerves to donated organs?

It's one thing to connect blood vessels, but how do surgeons get nerve impulses to organs like the heart in a transplant patient? Can transplant patients feel those organs?
gpt
They do not connect nerves to transplanted organs. Most organs don't actually require nerve input to function normally, and instead rely on hormones transmitted though the blood, like adrenalin, to alter how they function. People who have transplanted hearts actually cannot feel them, which leaves them unable to feel chest pain if they are having a heart attack. It also makes the heart immune to drugs like atropine that take advantage of nerves normally present to increase your heart rate. However the good news is hearts don't need external stimuli to function, they have what is called automaticity, Which means it will generate beats all by itself.