You can eat bear by the way. The meat is typically described as gamey and greasy but some people like that and the heart is basically all muscle, so it doesn't have that issue and tends to be extremely tender when cooked correctly.
As far as we know MC doesnt have a enhanced durability. How did he not be in the least broken ribs? He wasnt lightly tapped, he was hit so hard he flew hard into a tree. Thats not just bruising.