Ectodermal

Ectodermal

Pertaining to or derived from the ectoderm. The ectoderm is the outermost of the three primary germ layers of the embryo. From it are developed the epidermis and the epidermal tissues, such as the nails, hair, the nervous system, external sense organs such as the ear and eye.

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Part of Speech: noun
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Industry/Domain: Anatomy
Category: Developmental anatomy
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ectoderm

Biology; Neuroscience

The most superficial of the three embryonic germ layers; gives rise to the nervous system and epidermis.

ectoderm

Natural environment; Coral reefs

The outer germ layer of cells in an embryo that gives rise to the outer layer of skin (epidermis) and neural tissue.

ectodermal

Anatomy; Developmental anatomy

Pertaining to or derived from the ectoderm. The ectoderm is the outermost of the three primary germ layers of the embryo. From it are developed the epidermis and the epidermal ...

ectoderm

Biology; Cell biology

The outer layer of cells in embryonic development; gives rise to the skin, brain, and nervous system. Also, the outermost tissue layer in þatworms.

ectoderm

Medical; Human genome

1) The outer of the three germ layers of the embryo. 2) Outermost of the three germ layers of the embryo (the other two being mesoderm and endoderm); ectoderm gives rise to ...

ectoderm

Biology; Zoology

The outer basic layer of tissue in those animals with true tissues. In vertebrates, for instance, the embryonic ectoderm differentiates into the skin and also the nervous system.

trophoblast

Anatomy; Developmental anatomy

A granular protoplasmic body; a plastid, formed from cytotrophoblast, eventually surrounds the entire embryo; insert themselves between uterine epithelial cells, then spread along ...

ventralward

Anatomy; Developmental anatomy

Toward a belly, venter, or ventral aspect.

vertex

Anatomy; Developmental anatomy

The top or crown of the head.

yolk sac

Anatomy; Developmental anatomy

The yolk sac in man contains no nutrients so in this aspect is vestigial. However, the its embryonic endodermal roof is the source of the mucous membrane of almost the entire ...

zona pellucida

Anatomy; Developmental anatomy

A thick, transparent, noncellular layer or envelope of uniform thickness surrounding an oocyte. Also called the oolemma.

segmentation cavity

Anatomy; Developmental anatomy

The fluid-filled cavity of the mass of cells produced by cleavage of a fertilized ovum.

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