ectoderm


Also found in: Thesaurus, Medical, Encyclopedia, Wikipedia.
Related to ectoderm: mesoderm

ec·to·derm

 (ĕk′tə-dûrm′)
n.
1. The outermost of the three primary germ layers of an embryo, from which the epidermis, nervous tissue, and, in vertebrates, sense organs develop.
2. The outer layer of a diploblastic animal, such as a jellyfish.

ec′to·der′mal, ec′to·der′mic adj.

ectoderm

(ˈɛktəʊˌdɜːm) or

exoderm

n
(Biology) the outer germ layer of an animal embryo, which gives rise to epidermis and nervous tissue. See also mesoderm, endoderm
ˌectoˈdermal, ˌectoˈdermic adj

ec•to•derm

(ˈɛk təˌdɜrm)

n.
the outer germ layer in the embryo of a metazoan.
[1860–65]
ec`to•der′mal, ec`to•der′mic, adj.
ec`to•der•moi′dal (-dərˈmɔɪd l) adj.

ectoderm

An embryo’s outer germ layer, which develops into structures including the brain and skin. See endoderm,mesoderm
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.ectoderm - the outer germ layer that develops into skin and nervous tissueectoderm - the outer germ layer that develops into skin and nervous tissue
germ layer - (embryology) any of the 3 layers of cells differentiated in embryos following gastrulation
neural tube - a tube of ectodermal tissue in the embryo from which the brain and spinal cord develop
Translations

ec·to·derm

n. ectodermo, la capa más externa del embrión.
References in periodicals archive ?
It is a specialized thickened ectoderm rimming the distal end of the limb bud that controls outgrowth and patterning along the proximodistal axis.
Tuberous sclerosis is a neurocutaneous disorder characterised by the development of multiple benign tumours of the embryonic ectoderm.
One half is made of cells that will become amniotic ectoderm, the other half consists of pluripotent epiblast cells that in nature make up the embryonic disc.
Benign mature cystic teratomas of the ovary are composed of endoderm and ectoderm, but not mesoderm.
With regard to human embryology, iris tissue derives from the same embryological layer as the nervous system, we call the ectoderm.
13 The causes of both epidermoid and dermoid cysts include failure of surface ectoderm to separate from underlying structures, sequestration and implantation of surface ectoderm.
7) Several studies revealed that the pathogenesis of PGC can be explained by the dedifferentiation of malignant adenocarcinoma tissue to the level of the embryonal ectoderm, retaining the ability to form trophoblasts.
Dermoid cysts are formed due to defective epidermal closure along embryonic fissures, which isolates an island of ectoderm in dermis or subcutis.
Benign teratomas can be solid or cystic, and contain components representing all three cell layers: endoderm, mesoderm, and ectoderm.
6 Veenklaas, in 1952, theorized that incomplete separation of ectoderm and notochord could eventually result in spinal anomalies.
Results suggest that human neural crest cells can arise independently from, and prior to, the formation of mesoderm and neural ectoderm derivatives, both of which had been thought to be critical for neural crest formation.