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单词 entoderm
例句 entoderm
The shading is due to an increased growth of cells, because here the three germinal layers—embryonic ectoderm, mesoderm, and entoderm—are in contact. Embryology The Beginnings of Life 2011-09-12T02:00:28.483Z
Embryology.—The thymus is formed from a diverticulum, on each side, from the entoderm lining the third branchial groove, but the connexion with the pharynx is soon lost. Encyclopaedia Britannica, 11th Edition, Volume 8, Slice 8 "Dubner" to "Dyeing" 2010-12-26T03:00:17.840Z
The inner layer we call the entoderm, the outer the ectoderm; and the "primitive mouth" is known as the blastopore. The World's Greatest Books — Volume 15 — Science
Endoderm: the inner layer of the blastoderm in the embryo, giving origin to the mid-intestine and other visceral organs: see entoderm. Explanation of Terms Used in Entomology
The entoderm, which has the appearance of being thickened because of the fact that the notochord has not yet completely separated from it, is continuous, through the blastopore, with the ectoderm. Development of the Digestive Canal of the American Alligator
These layers we saw were termed the germinal layers, and were named respectively the “ectoderm,” the “entoderm,” and the “mesoderm”—the last appearing between the two former. Embryology The Beginnings of Life 2011-09-12T02:00:28.483Z
The lateral parts of the gland are developed from the entoderm of the fourth visceral clefts, and, joining the median part, lose their pharyngeal connexion. Encyclopaedia Britannica, 11th Edition, Volume 8, Slice 8 "Dubner" to "Dyeing" 2010-12-26T03:00:17.840Z
The body consists of two layers of cells, the ectoderm on the outside and the entoderm lining the digestive cavity. The Whence and the Whither of Man A Brief History of His Origin and Development through Conformity to Environment; Being the Morse Lectures of 1895
Afterwards there are slight histological differentiations in its ectoderm, though the entoderm remains a single stratum of cells. The Evolution of Man — Volume 2
Posterior to the blastopore 2 the primitive streak, ps, is seen as a collection of scattered cells between the ectoderm and the entoderm, apparently formed by proliferation from the ventral side of the ectoderm. Development of the Digestive Canal of the American Alligator
But in the monotremes the formation of the cenogenetic entoderm does not precede the invagination; hence in this case the construction of the germinal layers is less modified than in the other amniota. The Evolution of Man — Volume 1
They are developed from the entoderm of the third and fourth branchial grooves. Encyclopaedia Britannica, 11th Edition, Volume 8, Slice 8 "Dubner" to "Dyeing" 2010-12-26T03:00:17.840Z
Between the ectoderm and entoderm of the gastrula, in the space occupied by the supporting membrane of hydra, a new layer of cells, the mesoderm, appears. The Whence and the Whither of Man A Brief History of His Origin and Development through Conformity to Environment; Being the Morse Lectures of 1895
The cells of the entoderm are much larger, darker, and more fatty than those of the ectoderm, which are clearer and less rich in fatty particles. The Evolution of Man — Volume 2
The foregut is here more inclosed, and the notochord, nt, having separated from the entoderm, en, is seen as a distinct layer of cells extending from the foregut to the blastopore. Development of the Digestive Canal of the American Alligator
The authors who regard this embryonic form as the primary gastrula of the placental conceive the outer layer as the ectoderm and the inner as the entoderm. The Evolution of Man — Volume 1
This has been produced by the rapid growth and reproduction of certain cells of the entoderm which have migrated, so to speak, into this new position. The Whence and the Whither of Man A Brief History of His Origin and Development through Conformity to Environment; Being the Morse Lectures of 1895
It always forms in the embryo out of the entoderm or layer which becomes the lining of the intestine. The Whence and the Whither of Man A Brief History of His Origin and Development through Conformity to Environment; Being the Morse Lectures of 1895
This axial rod, which is the first foundation of the later vertebral column in all the vertebrates, and is the only representative of it in the Amphioxus, originates from the entoderm. The Evolution of Man — Volume 2
The mesoderm that extends ventrad from the mesentery, on each side of the entoderm just described, consists of a thick layer of compactly arranged cells. Development of the Digestive Canal of the American Alligator
The wall of the embryonic vesicle now consists throughout of two layers of cells, the ectoderm without and the entoderm within. The Evolution of Man — Volume 1
In our bodies only the lining of the mid-intestine and of its glands has arisen from the entoderm. The Whence and the Whither of Man A Brief History of His Origin and Development through Conformity to Environment; Being the Morse Lectures of 1895
The cells of both layers have at their bases long muscular fibrils, those of the ectodermal cells running longitudinally, those of the entoderm transversely. The Whence and the Whither of Man A Brief History of His Origin and Development through Conformity to Environment; Being the Morse Lectures of 1895
These longitudinal folds of the entoderm proceed from the primitive mouth, or from its lower and hinder edge. The Evolution of Man — Volume 2
In consequence of this, the animal cells of the ectoderm are darker than the vegetal cells of the entoderm. The Evolution of Man — Volume 1
The reason of its peculiar narrowness here is that it is, for the most part, full of yelk-cells of the entoderm. The Evolution of Man — Volume 1
In these the gastrulation proceeds in two phases, as Semon rightly observes: firstly, formation of the entoderm by cleavage at the centre and further growth at the edge; secondly, invagination. The Evolution of Man — Volume 1
Outer layer is the ectoderm; inner layer, the entoderm; internal cavity, the archenteron; mouth of cavity, blastopore. The Whence and the Whither of Man A Brief History of His Origin and Development through Conformity to Environment; Being the Morse Lectures of 1895
It seems to be true that blood-cells may be formed from the cells of the entoderm before the development of the mesoderm. The Evolution of Man — Volume 2
The part of the primitive gut that remains after the cutting off of these three dorsal primitive organs is the permanent gut; its entoderm is the gut-gland-layer or enteric layer. The Evolution of Man — Volume 1
This part of the entoderm, which thus represents the first structure of the middle germinal layer, is shown darker than the rest of the inner germinal layer in Figures 1.79 to 1.82. The Evolution of Man — Volume 1
The larger vegetal cells of the entoderm are richer in granules, and so darker than the smaller and lighter animal cells of the ectoderm. The Evolution of Man — Volume 1
Also almost any part of the animal containing both ectoderm and entoderm can be cut off and will develop into a new animal. The Whence and the Whither of Man A Brief History of His Origin and Development through Conformity to Environment; Being the Morse Lectures of 1895
These important processes of differentiation in the mesoderm, which we will consider more closely in the next chapter, proceed step by step with interesting changes in the ectoderm, while the entoderm changes little at first. The Evolution of Man — Volume 1
But the globular wall of the mammal vesicle is the differentiated ectoderm, and at one point in it we find a circular disk of quite different cells—the entoderm. The Evolution of Man — Volume 1
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