UBERON:0003411

EHDAA:140

VHOG:0000622

EMAPA:16265

EHDAA2:0000118

EMAPA:16111

we make the germ layer relationship develops_from, as currently the germ layers are declared to be purely embryonic. TODO - check. WP:Amnion - In the human embryo the earliest stages of the formation of the amnion have not been observed; in the youngest embryo which has been studied the amnion was already present as a closed sac, and appears in the inner cell-mass as a cavity. This cavity is roofed in by a single stratum of flattened, ectodermal cells, the amniotic ectoderm, and its floor consists of the prismatic ectoderm of the embryonic disk-the continuity between the roof and floor being established at the margin of the embryonic disk. Outside the amniotic ectoderm is a thin layer of mesoderm, which is continuous with that of the somatopleure and is connected by the body-stalk with the mesodermal lining of the chorion.

A mesenchyme that is part of a amnion.

UBERON:0003262

amnionic mesoderm

amnion mesoderm

mesenchyme of amnion

amnion mesenchyme

uberon

amnionic mesoderm

amnionic mesenchyme

UBERON:0003262

amniotic mesoderm