I guess in a way they are for "body parts" as the OP suggests. The top right and middle left pictures are of a dental forcep. The bayonet style shown is popular for upper molar roots, particularly the larger conical palatal root. Forceps are generally identified by number, often visible on the inner handle or outer heel. The one pictured is most likely a 286, but could also be a 65 or 32.
The offset angle of the beaks allows good access to the back of the upper jaw. The sharp beaks also allow deep seating on the root where rotational forces will expand the socket and loosen the root. This is often a lot safer than pushing with an elevator (think small straight shoe horn) for vertical displacement as the palatal roots are often closely associated with the floor of maxillary sinus. No fun pushing a root in there if it can be avoided.
I often use old dental forceps around the house once in a while on non dental jobs where nothing else works. They're $125 new; this one's worth a couple bucks.