“Urdhvamulam Adhah Shakham, Ashvattha Prahuravyayam”
Bhagavan Krishna in the Gita Chapter 15, Sloka 1 has remarked about a tree having its roots or origin above and branches underneath. This type of a tree is not noticed. This tree may be impermanent but its origin is indestructible.
This tree is the corporeal frame. The Inherent-Intrinsic beyond the gross human frame, in other words the One Who has kept this body alive is Prana or Atma. This Prana or Atma is Imperishable. The body has originated from Him.