Reattaching a body part is not actually transplantation.
If fingers, hands, and arms are relatively undamaged after being severed from the body, they can sometimes be reattached successfully. Reattachment of legs is less successful.
The severed part is kept clean and dry and is put in a plastic bag and placed on ice until it can be used. Prompt reattachment is crucial so that the blood supply to the severed part can be restored.