  We study (3+1) Morris-Thorne wormhole to investigate its higher dimensional
embedding structures and thermodynamic properties. It is shown that the
wormhole is embedded in (5+2) global embedding Minkowski space. This embedding
enables us to construct the wormhole entropy and Hawking temperature by
exploiting Unruh effects. We also propose a possibility of negative temperature
originated from exotic matter distribution of the wormhole.
