Answer:
What goes up a chimney down but can't go down a chimney up?
I am perfect with a head perfect without a head; Perfect with a tail perfect without a tail; Perfect with either neither or both.
I am an English word with 3 consecutive double letters.
The eight of us go forth not back to protect our king from a foe's attack. What are we?
I am a mountain at night meadow at day
It has no top or bottom, but it can hold flesh, bones, and blood all at the same time.