How To Use Ectoblast In A Sentence
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In this form, he says, the progaster is already developed, and its wall is differentiated for the first time into an animal or dermal layer (ectoblast), and into a vegetative or intestinal layer (hypoblast).
The Theories of Darwin and Their Relation to Philosophy, Religion, and Morality
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The former is often also called the ectoblast, or epiblast, and the latter the endoblast, or hypoblast.
The Evolution of Man — Volume 1
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In this form, he says, the progaster is already developed, and its wall is differentiated for the first time into an animal or dermal layer (ectoblast), and into a vegetative or intestinal layer (hypoblast).
The Theories of Darwin and Their Relation to Philosophy, Religion, and Morality
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LR1, and that the progress of epiboly over the next three or four hours coincides with mitotic quiescence of the ectoblast.
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But in all other animals the ovum first grows into two primary layers, the outer or animal layer (the ectoderm, epiblast, or ectoblast), and the inner or vegetal layer (the entoderm, hypoblast, or endoblast); and from these the tissues and organs are formed.
The Evolution of Man — Volume 1
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But in all other animals the ovum first grows into two primary layers, the outer or animal layer (the ectoderm, epiblast, or ectoblast), and the inner or vegetal layer (the entoderm, hypoblast, or endoblast); and from these the tissues and organs are formed.
The Evolution of Man — Volume 1
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The entire ectoderm arises from the first, second and third micromere quartets (collectively, the 'ectoblast').
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As epiboly proceeds, the ectoblast cap spreads out over the macromeres until it completely encloses them; at all times, ectodermal nuclei are distributed more or less evenly throughout this superficial cell sheet.
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Oppositely, the vegetal extremities of the ectoblast
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When the mesoblast has become thus infinitely subdivided into hundreds of minute spheres, the ectoblast bursts, and the new generations of cells thus set free collect in that part of the egg where the embryonic disk is to arise.
The Atlantic Monthly, Volume 10, No. 61, November, 1862
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B longitudinal section through the axis, g primitive-gut cavity, a primitive mouth-aperture, i inner cell-layer (entoderm, endoblast, gut-layer), e external cell-layer (outer germinal layer, ectoderm, ectoblast, or skin-layer).
The Evolution of Man — Volume 1
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(B) Schematic showing ontogeny of ectoblast cell distributions relative to the secondary axis.
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The former is often also called the ectoblast, or epiblast, and the latter the endoblast, or hypoblast.
The Evolution of Man — Volume 1
-
LR1, and that the progress of epiboly over the next three or four hours coincides with mitotic quiescence of the ectoblast.
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With the onset of epiboly, the ectoblast has become hemispherical, as reflected by the foreshortening of the 2a and 2c derivatives in this slightly dorsal view.
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This process goes on till all the cells are so filled by the mesoblast, with its myriad brood of cells, that the outer sac or ectoblast becomes a mere halo around it.
The Atlantic Monthly, Volume 10, No. 61, November, 1862