<Tr> <Th> MeSH </Th> <Td> D004475 </Td> </Tr> <Tr> <Th> FMA </Th> <Td> 69070 </Td> </Tr> <Tr> <Td_colspan="2"> Anatomical terminology (edit on Wikidata) </Td> </Tr> <P> Ectoderm is one of the three primary germ layers in the very early embryo . The other two layers are the mesoderm (middle layer) and endoderm (most proximal layer), with the ectoderm as the most exterior (or distal) layer . It emerges and originates from the outer layer of germ cells . The word ectoderm comes from the Greek ektos meaning "outside", and derma, meaning "skin ." </P>

A type of tissue that arises from the ectoderm