From the Set Items:
Arcanna's Head & Arcanna's Flesh, Cleglaw's Tooth & Cleglaw's Claw, Death's Hand, Hsarus' Iron Fist & Hsarus' Iron Heel, Infernal Cranium, Tancred's Skull & Tancred's Spine, Vidala's Fetlock, Cow King's Hide, Laying of Hands, Griswold's Heart, Magnus' Skin, Tal Rasha's Lidless Eye and Trang-Oul's Claws.
Uniques:
The Eye of Etlich, The Cat's Eye, Griffon's Eye, Bartuc's Cut-Throat, Boneflame, Arreat's Face, The Face of Horror, Wormskull, Boneflesh, Goldskin, Umbral Disk, The Hand of Broc, Bloodfist, Magefist, Gorefoot, Goblin Toe, Tearhaunch, Bladebone, Skull /B] Splitter, Brainhew, Raven Claw, Stoutnail, Bloodrise, Bonesnap, Stormeye, Blacktongue and Gravenspine.
I believe this prtetty much covers the human anathomy. Seems like the eyes and claws based items prevail.