It is impossible for a person to recover from brain death, in which there is no activity in the brain and the person is almost dead. It is not the same as a coma. Here is detailed information on what is brain death?
It depends on the organs and the time for which they have been removed from the deceased person. However, a heart and a lung can stay alive for around 4 – 6 hours, liver for 12- 24 hours and kidney for 48 – 72 hours.
In case of skin harvesting, only the upper layer of the skin is removed. There is no bleeding from the site and no disfigurement. And in fact, bandages will be applied on the parts of the body from where the skin is removed. It won’t be visible to the people who pay their homage.