How To Use Hypoblast In A Sentence
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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 proembryo from zygotic cell divisions may be divided into three parts: proper , hypoblast and suspensor.
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There is no evidence that mesoblastic tissues can be converted into those of the epiblastic or hypoblastic type, or vice versa_. "[
Q. E. D., or New Light on the Doctrine of Creation
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The blastosphere of the frog is like what the blastosphere of amphioxus would be, if the future hypoblast cells were enormously larger through their protoplasm being diluted with yolk.
Text Book of Biology, Part 1: Vertebrata
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Gastrula: that embryonic stage resembling a sac, with an outer layer of epiblastic cells and an inner layer of hypoblastic cells.
Explanation of Terms Used in Entomology
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Walls of the coelomic pouches, which form (a) an inner lining to the epiblast, (b) an outer coating to the hypoblast, and (c) the mesentery (m.), by which the intestine is supported.
Text Book of Biology, Part 1: Vertebrata
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But the notochord in the fowl is not so distinctly connected with the hypoblast, and so distinct from the mesoblast, as it is in the lower type, and no gills, internal or external, are ever developed.
Text Book of Biology, Part 1: Vertebrata
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The _lateral fistula of the neck_ -- formerly described as a branchial fistula -- according to Weglowski, usually takes origin from the remains of the hypoblastic diverticulum, which arises from the pharyngeal part of the third visceral cleft and extends downwards to form the thymus gland.
Manual of Surgery Volume Second: Extremities—Head—Neck. Sixth Edition.
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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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The hypoblastic notochord is early embraced by a mesoblastic sheath derived from the protovertebrae.
Text Book of Biology, Part 1: Vertebrata
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Epiblast is indicated by a line of dashes, mesoblast by dots, and hypoblast, dark or black.
Text Book of Biology, Part 1: Vertebrata
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These malformations are associated chiefly with imperfect development of the visceral or branchial arches and clefts, or of the hypoblastic diverticula from which the thyreoid and thymus glands are formed.
Manual of Surgery Volume Second: Extremities—Head—Neck. Sixth Edition.
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The prospective endoderm displaces the hypoblast and the mesoderm forms a layer between ectoderm and endoderm.
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Why is the origin of mesoderm from hypoblast in some groups not regarded as a secondary adaptation?
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Just as the yolk cells of the frog form the ventral wall of the intestine, so nuclei appear along the upper side of the yolk of the fowl, where some protoplasm still exists, and give rise to the ventral hypoblastic cells.
Text Book of Biology, Part 1: Vertebrata
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E, Shimoni Y, Eyal-Giladi H (1983) Nature of the hypoblastic influence on the chick embryo epiblast.
PLoS ONE Alerts: New Articles
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The hypoblast gives rise to extra-embryonic structures such as the stalk of the yolk sac, whereas the embryo proper is formed from the remaining blastoderm cells, known as the epiblast.
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Why then, asks Balfour, are hypoblast and epiblast continuous?
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Using Lankester's terms epiblast, hypoblast and mesoblast for the embryonic germ layers, Balfour described chick ectoderm and endoderm for the first time in English.
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The hypoblast is the lining of the intestine and of the glands which open into it; and the material of the notochord is also regarded, as hypoblast.
Text Book of Biology, Part 1: Vertebrata
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Subsequently (hypoblastic) internal gills (int. g.,
Text Book of Biology, Part 1: Vertebrata
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Entoderm: the innermost germ layer of the embryo, from which are derived the epithelium of the alimentary canal and accessory structures: = endoderm and hypoblast.
Explanation of Terms Used in Entomology
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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 true mouth is formed late by a tucking-in of epiblast, the stomodaeum (s.d.), which meets and fuses with the hypoblast, and is then perforated.
Text Book of Biology, Part 1: Vertebrata
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The true mouth is formed late by a tucking-in of epiblast, the stomodaeum (s.d.), which meets and fuses with the hypoblast, and is then perforated.
Text Book of Biology, Part 1: Vertebrata
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By conceiving a gradually increasing amount of yolk in the hypoblastic cells in the ventral side of the archenteron, the substantial identity of the gastrula stage in the three types, which at first appear so strikingly different, will be perceived.
Text Book of Biology, Part 1: Vertebrata
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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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The liver and other digestive glands are first formed, like the lungs, as hollow outgrowths, and their lining is therefore hypoblastic.
Text Book of Biology, Part 1: Vertebrata
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Why is the origin of mesoderm from hypoblast in some groups not regarded as a secondary adaptation?
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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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Walls of the coelomic pouches, which form (a) an inner lining to the epiblast, (b) an outer coating to the hypoblast, and (c) the mesentery (m.), by which the intestine is supported.
Text Book of Biology, Part 1: Vertebrata