Ectoderm

Word ECTODERM
Character 8
Hyphenation ec to derm
Pronunciations N/A

Definitions and meanings of "Ectoderm"

What do we mean by ectoderm?

The outermost of the three primary germ layers of an embryo, from which the epidermis, nervous tissue, and, in vertebrates, sense organs develop. noun

The outer layer of a diploblastic animal, such as a jellyfish. noun

The completed outer layer of cells, or outer blastodermic membrane, in all metazoan animals, formed by the cells of the epiblast, and primitively constituting the outer wall of the whole body, as the endoderm does that of the body-cavity; an epiblast, ectoblast, or external blastoderm. noun

The outer layer of the blastoderm; epiblast. 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. noun

Outermost of the three tissue layers in the embryo of a metazoan animal. Through development, it will produce the epidermis (skin) and nervous system of the adult. noun

The outer germ layer that develops into skin and nervous tissue noun

Outermost of the three tissue layers in the embryo of a metazoan animal. Through development, it will produce the epidermis (skin) and nervous system of the adult.

Synonyms and Antonyms for Ectoderm

  • Antonyms for ectoderm
  • Ectoderm antonyms not found!

The word "ectoderm" in example sentences

Both the skin and the brain are derived from the same embryonic tissue, which is known as the ectoderm. ❋ M.D. Nicholas Perricone (2010)

The outer layer of this ‘gastrula’ is called the ectoderm, the inner layer is the endoderm, and there are also some cells thrown into the space between the ectoderm and endoderm, which are called mesoderm. ❋ RICHARD DAWKINS (2009)

Thus a portion of the upper marginal zone of the blastula or early gastrula, or else a piece of the roof of the archenteron of the mature gastrula was planted in the blastocoele of a young gastrula and so brought beneath the ectoderm from the beginning; it was demonstrated that these portions were able to induce neural plate. ❋ Unknown (1965)

The terms ectoderm and entoderm were introduced by Allman [330] in 1853 for the two cell-layers in the Hydrozoa. ❋ Unknown (N/A)

A cell mass is first produced, and the cells in this differentiate into three layers called ectoderm, entoderm and mesoderm, from which the external and internal surfaces and the enclosed tissues respectively develop, and the different organs are produced by growth of the cells of certain areas of these layers. ❋ William Thomas Councilman (N/A)

The point to remember is, that in all cases a gastrula is an open sac composed of two layers of cells -- the outer layer being called the ectoderm, and the inner the endoderm. ❋ George John Romanes (1871)

At the very early stages, the cells are lumped into 3 layers, called the ectoderm, mesoderm, and endoderm. ❋ Unknown (2009)

The cord is covered by a layer of ectoderm which is continuous with that of the amnion, and its various constitutents are enveloped by embryonic gelatinous tissue, jelly of Wharton. ❋ Unknown (1918)

The outer layer, from which come the external skin and the muscles, was then called by Allman (1853) the "ectoderm" (outer layer, or skin); the inner layer, which forms the alimentary and reproductory organs, was called the "entoderm" (= inner layer). ❋ Ernst Heinrich Philipp August Haeckel (1876)

A section of ectoderm invaginates progressively backwards along the body like a zip fastener, rolls itself up into a tube, and is pinched off where the sides of the tube ‘zip up’ so that it ends up running the length of the body between the outer layer and the notochord. ❋ RICHARD DAWKINS (2009)

For example, the outer skin and nervous system come from the ectoderm; the guts and other internal organs come from the endoderm; and the mesoderm furnishes muscle and bone. ❋ RICHARD DAWKINS (2009)

You remember I said that the nervous system comes from ectoderm. ❋ RICHARD DAWKINS (2009)

Instead, the standard method for ascertaining whether putative hESCs are truly pluripotent is to inject them into postnatal, immune-deficient mice, and see whether they give rise to teratomas (tumors that consist of disorganized tissue growth of the three embryonic germ layers, endoderm, mesoderm, and ectoderm). ❋ Streiffer, Robert (2009)

They are adaptable animals, eating small crustaceans that are found in abundant numbers in lakes and in rivers and switching to molecular dietary absorption through their ectoderm when crustacean populations are scarce. ❋ Unknown (2009)

Further tests confirmed that they were, in fact, stem cells capable of differentiating into the cell types that make up the three layers in an embryo – endoderm, mesoderm and ectoderm – a quality that all embryonic stem cells have. ❋ Unknown (2009)

For example, in my (admittedly-retarded) browser, the ectoderm tissue layer shows up as a pinkish tone (and likewise the label), but the ectoderm-derivatives of the neural tube and neural crests are shown in the same orange-red as the mesoderm. ❋ Unknown (2006)

Cross Reference for Ectoderm

What does ectoderm mean?

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