Examples from the Web for ectoderm
Ectoderm and entoderm in this region with the intervening mesodermal layer form the cloacal membrane (Fig. 21).
These are three in number, being called respectively the ectoderm, endoderm and The layer theory.
The mesenchymal tissue between the mesothelium and the ectoderm forms the mass of the skeletal, muscular and vascular systems.
Ectoderm, ek′to-dėrm, n. the external germinal layer of the embryo.
The two layers of the gastrula may now be spoken of as ectoderm and entoderm.The Works of Francis Maitland Balfour, Volume 1|Francis Maitland Balfour