Answer:
Goes over all the hills and hollows, Bites hard, but never swallows.
It's red liquid but not liquid and it's not red. What is it?
Taken from a mine and then locked up in a wooden case. I am used by students everyday.
I'm written with two letters, said with one and seen with two. What am I?
I am brown and sticky
It has no top or bottom, but it can hold flesh, bones, and blood all at the same time.