system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why an arm or leg transplant isn't as commom as a heart or kidney transplant?
gpt
Because to reconnect a arm or a leg you need to reattach:

Ligments

Tendons

Blood vessels

Possibly some muscles

Neural connections

Nerves

The bone marrow needs to produce the same blood cells as the rest of the body.