Answer:
What has a thumb and four fingers but is not alive?
I am a protector. I sit on a bridge. One person can see right through me, while others wonder what I hide. What am I?
Lovely and round I shine with pale light grown in the darkness a lady's delight.
I am the only word that looks the same when spelled upside down.
I am the kind of a tree that is carried in your hand. What am I?
It has no top or bottom, but it can hold flesh, bones, and blood all at the same time.