Answer:
if your question is what do we need to survive like the requirements, it would literately be every organ you have with food and water. you also need blood and a nervous system.
Explanation:
Our body is made up of cells in which transfer of message between cells takes p[lace by intercelluar liquid called matrix .if damage any of your part the matrix between it get destroyed ,but our brain is able to able get recover some of it ,but not all result in incomplete healing of that part and we cannot recover fully.
No the Appalachian Mountains are in North America hope I helped