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- Polarity_in_embryogenesis abstract "In developmental biology, an embryo is divided into two hemispheres: the animal pole and the vegetal pole within a blastula.The animal pole consists of small cells that divide rapidly, in contrast with the vegetal pole below it. In some cases, the animal pole is thought to differentiate into the later embryo itself, forming the three primary germ layers and participating in gastrulation. The vegetal pole contains large yolky cells that divide very slowly, in contrast with the animal pole above it. In some cases, the vegetal pole is thought to differentiate into the extraembryonic membranes that protect and nourish the developing embryo, such as the placenta in mammals and the chorion in birds.The development of the animal-vegetal axis occurs prior to fertilisation. Sperm entry can occur anywhere in the animal hemisphere. The point of sperm entry defines the dorso-ventral axis - cells opposite the region of sperm entry will eventually form the dorsal portion of the body.In the frog Xenopus laevis, a pigment pattern provides the oocyte with features of a radially symmetrical body with a distinct polarity. The animal hemisphere is dark brown, and the vegetal hemisphere is only weakly pigmented. The axis of symmetry passes through on one side the animal pole, and on the other side the vegetal pole. The two hemispheres are separated by an unpigmented equatorial belt. Polarity has a major influence on the emergence of the embryonic structures. In fact, the axis polarity serves as one coordinate of geometrical system in which early embryogenesis is organised.".
- Polarity_in_embryogenesis thumbnail Oocyte_Poles.jpg?width=300.
- Polarity_in_embryogenesis wikiPageID "7327786".
- Polarity_in_embryogenesis wikiPageLength "3283".
- Polarity_in_embryogenesis wikiPageOutDegree "15".
- Polarity_in_embryogenesis wikiPageRevisionID "707577911".
- Polarity_in_embryogenesis wikiPageWikiLink African_clawed_frog.
- Polarity_in_embryogenesis wikiPageWikiLink Blastula.
- Polarity_in_embryogenesis wikiPageWikiLink Category:Developmental_biology.
- Polarity_in_embryogenesis wikiPageWikiLink Chorion.
- Polarity_in_embryogenesis wikiPageWikiLink Developmental_biology.
- Polarity_in_embryogenesis wikiPageWikiLink Embryo.
- Polarity_in_embryogenesis wikiPageWikiLink Embryogenesis.
- Polarity_in_embryogenesis wikiPageWikiLink Extraembryonic_membranes.
- Polarity_in_embryogenesis wikiPageWikiLink Gastrulation.
- Polarity_in_embryogenesis wikiPageWikiLink Germ_layer.
- Polarity_in_embryogenesis wikiPageWikiLink Oocyte.
- Polarity_in_embryogenesis wikiPageWikiLink Placenta.
- Polarity_in_embryogenesis wikiPageWikiLink File:Oocyte_Poles.jpg.
- Polarity_in_embryogenesis wikiPageWikiLinkText "Polarity in embryogenesis".
- Polarity_in_embryogenesis wikiPageWikiLinkText "animal hemisphere".
- Polarity_in_embryogenesis wikiPageWikiLinkText "animal pole".
- Polarity_in_embryogenesis wikiPageWikiLinkText "polarity".
- Polarity_in_embryogenesis wikiPageWikiLinkText "vegetal hemisphere".
- Polarity_in_embryogenesis wikiPageWikiLinkText "vegetal pole".
- Polarity_in_embryogenesis wikiPageUsesTemplate Template:Developmental-biology-stub.
- Polarity_in_embryogenesis wikiPageUsesTemplate Template:Reflist.
- Polarity_in_embryogenesis subject Category:Developmental_biology.
- Polarity_in_embryogenesis comment "In developmental biology, an embryo is divided into two hemispheres: the animal pole and the vegetal pole within a blastula.The animal pole consists of small cells that divide rapidly, in contrast with the vegetal pole below it. In some cases, the animal pole is thought to differentiate into the later embryo itself, forming the three primary germ layers and participating in gastrulation.".
- Polarity_in_embryogenesis label "Polarity in embryogenesis".
- Polarity_in_embryogenesis sameAs Q7209147.
- Polarity_in_embryogenesis sameAs m.025z9hz.
- Polarity_in_embryogenesis sameAs Q7209147.
- Polarity_in_embryogenesis wasDerivedFrom Polarity_in_embryogenesis?oldid=707577911.
- Polarity_in_embryogenesis depiction Oocyte_Poles.jpg.
- Polarity_in_embryogenesis isPrimaryTopicOf Polarity_in_embryogenesis.