part_of part of part of has part has part has_part anatomical entity anatomical entity zone of skin http://upload.wikimedia.org/wikipedia/commons/6/6d/Skin.svg http://upload.wikimedia.org/wikipedia/commons/e/e8/HumanSkinDiagram.jpg Wikipedia:Skin MIAA:0000284 portion of skin MAT:0000284 MA:0000151 (...) it is well-established that neural crest cells contribute to both the dermal skeleton (craniofacial bone, teeth, and the caudal fin rays of teleosts) and the integument, including craniofacial dermis and all pigment cells outside the retina (...).[well established][VHOG] skin skin region EV:0100152 FMA:86166 MESH:D012867 VHOG:0000860 GAID:933 we assume that mouse, HOG and GAID all mean zone of skin when they say skin. We also choose skin as an exact synonym, as it is more intuitive SCTID:20795001 UBERON:0000014 Note the distinction between the entire skin of the body, of which there is only 1 in an organism, and zones of skin, of which there can be many. Examples: skin of knee uberon OpenCyc:Mx4rvVjX3ZwpEbGdrcN5Y29ycA EMAPA:17525 EHDAA:6530 Any portion of the organ that covers that body and consists of a layer of epidermis and a layer of dermis. EHDAA2:0001844 skin zone region of skin skin epidermis dermis skin of body ectoderm-derived structure zone of organ