Go here and take a look at this page ... This should answer your question's better Xarmy55, if you can see what the vitals and bone structure is like.
Anatomy is a good way to find the vitals and kill zones.

http://www.bowzone.ca/pdf/bearshotplacement.pdf

Here's one I took last year .. after I stalked him for 350 yards and an hour , with a 4-5 yard shot that only went about 10 yards before he took his last breath. I ended up shooting him out of a tree that he climbed up to get berries. So much Adrenaline , I will never forget that hunt. Good Luck to you this year.