enveloping layer of ectodermGo to external page http://purl.obolibrary.org/obo/UBERON_0007383
relationship loss: develops_from superficial blastomere (TAO:0001484)[TAO]
Outermost layer of cells surrounding the embryo.
Outermost monolayer of cells surrounding the embryo that become very flattened in the blastula and give rise to the periderm. Sometimes used synonymously with periderm. Kimmel et al, 1995.[TAO]
Originally this tissue is one cell layer thick but in most vertebrates it soon becomes a two layered structure. The outer layer gives rise to the periderm.