What feats and class features can grant a half-orc monk natural attacks?

I want to play a half-orc monk who specializes in combining unarmed strikes with natural attacks. By monk, I mean I’d at least like the character to be enough of a monk so that he benefits from the special abilities AC bonus and flurry of blows.

Are there class features or feats that enable my dream of a serene master of fist, tusk, and claw?