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What (who) is ectoderm$23799$ - definition
EMBRYONIC INNER CELL MASS TISSUE THAT FORMS THE EMBRYO ITSELF, THROUGH THE THREE GERM LAYERS
Ectoblast; Primitive ectoderm; Epiblasts
Ectodermal
.jpg?width=200 "Dental abnormalities in a 5-year-old girl from northern Sweden who suffered from various symptoms of autosomal dominant hypohidrotic ectodermal dysplasia (HED) a) Intraoral view. Note that the upper incisors have been restored with composite material to disguise their original conical shape. b) Orthopantomogram showing absence of ten primary and eleven permanent teeth in the jaws of the same individual.")
GERM LAYER THAT FORMS THE BRAIN, SPINAL CORD, EPIDERMIS AND MORE
Ectodermal; Embryonic ectoderm; Ectoderma
·adj ·Alt. of Ectodermic.
Ectoderm
GERM LAYER THAT FORMS THE BRAIN, SPINAL CORD, EPIDERMIS AND MORE
Ectodermal; Embryonic ectoderm; Ectoderma
·noun The outer layer of the blastoderm; epiblast.
II. Ectoderm ·noun The external skin or outer layer of an animal or plant, this being formed in an animal from the epiblast. ·see ·Illust. of Blastoderm.
Ectoderm
GERM LAYER THAT FORMS THE BRAIN, SPINAL CORD, EPIDERMIS AND MORE
Ectodermal; Embryonic ectoderm; Ectoderma
The ectoderm is one of the three primary germ layers formed in early embryonic development. It is the outermost layer, and is superficial to the mesoderm (the middle layer) and endoderm (the innermost layer).
Wikipedia
Epiblast
In amniote embryonic development, the epiblast (also known as the primitive ectoderm) is one of two distinct cell layers arising from the inner cell mass in the mammalian blastocyst, or from the blastula in reptiles and birds, the other layer is the hypoblast. It derives the embryo proper through its differentiation into the three primary germ layers, ectoderm, mesoderm and endoderm, during gastrulation. The amnionic ectoderm and extraembryonic mesoderm also originate from the epiblast.
The other layer of the inner cell mass, the hypoblast, gives rise to the yolk sac, which in turn gives rise to the chorion.
