How To Use Archenteron In A Sentence
-
They distinguished in the middle layer two quite distinct elements, the mesoblast proper, formed by the evagination of the walls of the archenteron, and the mesenchyme, formed by free cells budded off from the germ-layers.
Form and Function A Contribution to the History of Animal Morphology
-
For that matter, even the syncytial ‘gut’ departs further from the cnidarian or poriferan system than from the bilaterian archenteron.
-
This stage is called the gastrula stage; ar. is the cavity of the gastrula, the archenteron; b.p. is its opening or blastopore.
Text Book of Biology, Part 1: Vertebrata
-
Kowalevsky, in 1871, showed that the body-cavity of Sagitta was formed by a division of the archenteron into three parallel cavities, and in 1874 demonstrated the same fact for the Brachiopoda.
Form and Function A Contribution to the History of Animal Morphology
-
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
-
In the fossils I and J, the archenteron is thick-walled, and in J all of the cells in the embryo, including the ectodermal wall, are conspicuously larger relative to the size of the embryo.
-
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.
Hans Spemann - Nobel Lecture
-
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.
Hans Spemann - Nobel Lecture
-
The mesoderm then lies immediately beneath the ectoderm, with the endoderm lining the roof of the archenteron, the future gut.
-
With the notochord he homologised the supporting rod in the proboscis of _Balanoglossus_, which like the notochord arises from the dorsal wall of the archenteron, and has a vacuolated structure.
Form and Function A Contribution to the History of Animal Morphology
-
There exist, doubtless, homologies of great atavistic importance -- I consider as such, for example, the formation of the cavity of Rusconi [the archenteron] in Ascidians and lower
Form and Function A Contribution to the History of Animal Morphology
-
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.
Hans Spemann - Nobel Lecture
-
They form the walls of a new cavity, the enterocoel, which is to be regarded as a nipped-off diverticulum of the archenteron.
Form and Function A Contribution to the History of Animal Morphology
-
Gastræa; they form the limits of the organism towards the exterior and towards the archenteron.
Form and Function A Contribution to the History of Animal Morphology
-
Professor E. Ray-Lankester suggested three years afterwards (1875) the name archenteron for the primitive gut, and blastoporus for the primitive mouth.) (FIGURE.1.36.
The Evolution of Man — Volume 1
-
In the direct development Bateson showed that the three divisions of the coelom arise as pouches constricted off from the archenteron or primitive gut, thus resembling the development of the mesoblastic somites of _Amphioxus_.
Encyclopaedia Britannica, 11th Edition, Volume 3, Part 1, Slice 2 "Baconthorpe" to "Bankruptcy"
-
It doesn't seem to do much of anything, except to offer little suggestions to cells migrating into the archenteron.
-
Its relation to the Coelom theory lies in the fact that Sedgwick regarded the segmentation of the body as moulded upon the segmentation of the mesoblast, which in its turn, as Kowalevsky and Hatschek had shown, was a consequence of its mode of origin as a series of pouches of the archenteron.
Form and Function A Contribution to the History of Animal Morphology
-
It becomes even more obvious when a piece of the roof of the archenteron is planted in the blastocoele.
Hans Spemann - Nobel Lecture
-
Kowalevsky, in 1871, showed that the body-cavity of Sagitta was formed by a division of the archenteron into three parallel cavities, and in 1874 demonstrated the same fact for the Brachiopoda.
Form and Function A Contribution to the History of Animal Morphology
-
It becomes even more obvious when a piece of the roof of the archenteron is planted in the blastocoele.
Hans Spemann - Nobel Lecture
