I usually do not gross out at other's blood. DH had a pretty bad wreck a few weeks ago, while I was cleaning a nasty puncture that just didn't want to stop bleeding all I could think was "this is a pretty cool injury". I could not pack his open wound after his apendectomy got infected because he wrenched and screamed. My own blood in anything more than a minor cut will make me panic though.

At first Maggie's blood didn't gross me out then I got slightly queasy and now I have a maroon koozy.

I am not sure I could do human cadavers. My college roommate is a doctor, she was so excited about it in med school she called me "WE GOT OUR BODIES TODAY!!!" Different strokes.