Ectoderm
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2008-07-15T21:08:35Z
Chodges
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{{Infobox Embryology |
Name = {{PAGENAME}} |
Latin = |
GraySubject = 6 |
GrayPage = 48 |
Image = Ectoderm.png |
Caption = Organs derived from ectoderm. |
Image2 = Gray11.png |
Caption2 = Section through embryonic disk of [[Vespertilio murinus]]. |
System = |
CarnegieStage = |
Days = 16 |
Precursor = |
GivesRiseTo = |
MeshName = Ectoderm |
MeshNumber = A16.254.425.273 |
DorlandsPre = |
DorlandsSuf = |
}}
The '''ectoderm''' is the start of a tissue that covers the body surfaces. It emerges first and forms from the outermost of the [[germ layer]]s.
Generally speaking, the ectoderm differentiates to form the [[nervous system]], [[Epidermis (skin)|epidermis]], and the outer part of [[integumentary system|integument]].
In [[vertebrate]]s, the ectoderm has three parts: [[external ectoderm]] (also known as [[surface ectoderm]]), the [[neural crest]], and [[neural tube]]. The latter two are known as [[neuroectoderm]].
[[Image:Gray32.png|thumb|left|Section through ovum imbedded in the uterine decidua]]
{{Embryology}}
{{Germ layer}}
[[Category:Developmental biology]]
[[Category:Embryology]]
[[Category:Gastrulation]]
{{developmental-biology-stub}}
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[[ru:Эктодерма]]
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[[zh:外胚层]]