From this Spemann could ascertain that the blastopore had an organizing influence on its environment.    From Wordnik.com.  [Physiology or Medicine 1935 - Presentation Speech] Reference

Then in front of this blastopore there arise from the ectoderm the primordia of the brain and spinal cord.    From Wordnik.com.  [Physiology or Medicine 1935 - Presentation Speech] Reference

In the course of gastrulation the invaginating material is rolled inwards around the upper lip of the blastopore.    From Wordnik.com.  [Hans Spemann - Nobel Lecture] Reference

The characteristic relation of the central nervous system to the blastopore in Annelida and Vertebrates had already been pointed out by.    From Wordnik.com.  [Form and Function A Contribution to the History of Animal Morphology] Reference

In other respects Sedgwick's speculations link on more closely to the Gastræa theory, for one of his main contentions is that the blastopore or.    From Wordnik.com.  [Form and Function A Contribution to the History of Animal Morphology] Reference

Spemann then transplanted the anterior lip of the blastopore of an embryo into the ventral side of another embryo it grew a new brain and spinal cord.    From Wordnik.com.  [Physiology or Medicine 1935 - Presentation Speech] Reference

Why, for instance, should the blastopore so often appear as a long slit, closing by concrescence, unless this had been the original method of its formation in remote Coelenterate ancestors?.    From Wordnik.com.  [Form and Function A Contribution to the History of Animal Morphology] Reference

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.    From Wordnik.com.  [Development of the Digestive Canal of the American Alligator] Reference

Upper blastopore lip still engaged in invagination was implanted in a different orientation in relation to the host embryo - crosswise and opposite to the orientation of the later primary primordia.    From Wordnik.com.  [Hans Spemann - Nobel Lecture] Reference

This brain and spinal cord did not arise from the transplanted cell material, but from the presumptive ventral epidermis whose course of development was thus altered by the presence of the blastopore.    From Wordnik.com.  [Physiology or Medicine 1935 - Presentation Speech] Reference

Then along the line of invagination, i.e. the primitive orifice or blastopore, runs the outer layer of cells or ectoderm into the two invaginated layers, the mesoderm (originating from the marginal zone), and entoderm.    From Wordnik.com.  [Hans Spemann - Nobel Lecture] Reference

Now, when random samples were taken from the whole surface of the gastrula and transplanted in this way in an indifferent place it became apparent that a limited area, namely the region of the upper and lateral blastopore lip did not conform.    From Wordnik.com.  [Hans Spemann - Nobel Lecture] Reference

This feeling of frustration, so incisively conveyed by these considerations by P. Medawar, pervaded in the forties the field of experimental embryology which had been enthusiastically acclaimed in the mid-thirties, when the upper lip of the amphibian blastopore brought this area of research to the forefront of the biological stage.    From Wordnik.com.  [Nobel Lecture The Nerve Growth Factor: Thirty-Five Years Later] Reference

The primitive streak is, in fact, the scar of a closed blastopore.    From Wordnik.com.  [Text Book of Biology, Part 1: Vertebrata] Reference

Figure 9 gives a similar diagram of a later stage, but here the blastopore is closed.    From Wordnik.com.  [Text Book of Biology, Part 1: Vertebrata] Reference

Figure 6 shows a slightly later ovum than Figure 5, seen from the dorsal side. b.p. is the blastopore.    From Wordnik.com.  [Text Book of Biology, Part 1: Vertebrata] Reference

(Section 9) for invagination, nor to obliterate the archenteron and the blastopore through its pressure.    From Wordnik.com.  [Text Book of Biology, Part 1: Vertebrata] Reference

The space ar. is the archenteron, the primordial intestine, and its mouth is called, the blastopore (bp.).    From Wordnik.com.  [Text Book of Biology, Part 1: Vertebrata] Reference

The inner layer we call the entoderm, the outer the ectoderm; and the "primitive mouth" is known as the blastopore.    From Wordnik.com.  [The World's Greatest Books — Volume 15 — Science] Reference

This stage is called the gastrula stage; ar. is the cavity of the gastrula, the archenteron; b.p. is its opening or blastopore.    From Wordnik.com.  [Text Book of Biology, Part 1: Vertebrata] Reference

At the beginning of gastrulation, the blastocoel roof is one cell thick, and the dorsal lip of the blastopore forms below the equator of the embryo.    From Wordnik.com.  [BioMed Central - Latest articles] Reference

By a comparison of the figures of frog and fowl the student will easily perceive the complete correspondence of the position of this with the blastopore of the frog.    From Wordnik.com.  [Text Book of Biology, Part 1: Vertebrata] Reference

You can see the early scrambling of cells in the blastula, migration during epiboly and blastopore closure, and convergence in the formation of the body axis fairly easily.    From Wordnik.com.  [ScienceBlogs Channel : Life Science] Reference

At the end of gastrulation, a small archenteron spreading dorsally from the blastopore represents the relatively small and superficial area of the egg where early embryonic axis formation occurs.    From Wordnik.com.  [BioMed Central - Latest articles] Reference

Although it had been shown long ago that the point of sperm entry determines the plane of first cleavage (and thus subsequent ones) in Embryological gastrulation. 1 - blastula, 2 - gastrula with blastopore; orange - ectoderm, red.    From Wordnik.com.  [CreationWiki - Recent changes [en]]

This latter creature, like the gastrula, consists essentially of two layers of cells, an outer protective and sensory layer, and an inner digestive one; it has a primordial intestine, or archenteron, and its mouth is sometimes regarded as being a blastopore.    From Wordnik.com.  [Text Book of Biology, Part 1: Vertebrata] Reference

But once or twice lately there had been signs that a third interest was creeping into his life, and he had found his attention wandering from the fate of the mesoblastic somites or the probable meaning of the blastopore, to the thought of the girl with the brown eyes who sat at the table before him.    From Wordnik.com.  [The Country of the Blind, and Other Stories] Reference

The orifice is called the blastopore.    From Wordnik.com.  [Physiology or Medicine 1935 - Presentation Speech] Reference