<Table> <Tr> <Th_colspan="2"> Skin appendages </Th> </Tr> <Tr> <Th_colspan="2"> Details </Th> </Tr> <Tr> <Th> System </Th> <Td> Integumentary system </Td> </Tr> <Tr> <Th_colspan="2"> Identifiers </Th> </Tr> <Tr> <Th> Latin </Th> <Td> adnexa cutis </Td> </Tr> <Tr> <Th> TH </Th> <Td> H3. 12.00. 3.00001 </Td> </Tr> <Tr> <Td_colspan="2"> Anatomical terminology (edit on Wikidata) </Td> </Tr> </Table> <Tr> <Th_colspan="2"> Skin appendages </Th> </Tr> <Tr> <Th_colspan="2"> Details </Th> </Tr>

Which of these is not an appendage of the skin