Subject: What types of human cells do not undergo cell division and why?

I suppose im asking because my science teacher assigned this question which i 
simply can't find an answer to and i've been looking for about six hours. I 
read your policies but i don't consider this "doing my homework for me." 
However if you disagree a simple point in the right direction would be greatly 
appreciated, Im pretty sure brain cells are an example but i really have no 
clue why, so if you could help me out you have no idea how greatful i'd be.

Re: What types of human cells do not undergo cell division and why?