blastopore
a pore of the blastula stage that opens into the archenteron
Source: Noland, George B. 1983. General Biology, 11th Edition. St. Louis, MO. C. V. Mosby ...
Blastopore
[Gr. blastos - germ, bud, shoot; L. porus - a pore or passage]. The opening between the archenteron and outside of the embryo, formed by invagination during gastrulation. In some organisms, it becomes the anus.
blastopore
(blas-toh-por) [Gk. blastos, sprout + poros, a way, means, path]
The opening of the archenteron in the gastrula that develops into the mouth in protostomes and the anus in deuterostomes.
blastula ...
blastopore - site of gastrulation initiation and later the opening of the archenteron at the vegetal region of certain embryos (e.g., echinoderm and amphibian); in deuterostome embryos it is the future anus of the organism.
blastopore
The opening of the gastrula that develops into the mouth in protostomes and the anus in deuterostomes.
blastula
The hollow ball of cells marking the end stage of cleavage during early embryonic development.
Blastopore forms future mouth and anus
Blastopore forms future anus only. Mouth forms later.
Few HOX genes for the posterior ...
blastopore External opening of the archenteron in the gastrula.
blastula An early stage in the development of an embryo; it consists of a sphere of cells enclosing a fluid-filled cavity (blastocoel).
Protostomes (from the Greek meaning literally "first mouth") are coelomates whose embryonic development makes a blastopore (the first opening in the blastula) that later develops into a mouth.
After the coalescence of the neural folds over the anterior end of the primitive streak, the blastopore no longer opens on the surface but into the closed canal of the neural tube, and thus a transitory communication, the neurenteric canal, ...
a homeodomain transcription factor expressed in the dorsal lip of the blastopore; may be a key factor is specifying these cells as the organizer of the embryo.
The opening into the gastrula is known as the blastopore. The inner cavity created by the infolding is known as the archenteron.
[edit] Movements ...
Fate of cells is indeterminate; if embryonic cells are separated, each one develops into a complete organism.
The blastopore is associated with the anus, and the second embryonic opening is associated with the mouth.
gastrula n. , pl. -las or -lae ( ). An embryo at the stage following the blastula, consisting of a ... archenteron. neurula. gastrulate. blastopore ...
Full article ...
broad classification of organisms that tend to share certain embryological traits; among these the formation of the "mouth first" (hence the name) during gastrulation, before the future anus. (The site of gastrulation initiation, the blastopore, ...
 See also: Embryo, Cells, Organ, Human, Fertilization
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