Answer:
What has one eye but cannot see?
Draw fire or fill me; I'm still empty.
What force and strength cannot get through I with my unique teeth can do.
I am a king who's good at measuring stuff.
What has roots that nobody sees and is taller than trees. Up up up it goes and yet never grows?
It has no top or bottom, but it can hold flesh, bones, and blood all at the same time.