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- Embryological_origins_of_the_mouth_and_anus abstract "The embryological origin of the mouth and anus is an important characteristic, and forms the morphological basis for separating bilaterian animals into two natural groupings: the protostomes and deuterostomes.In animals at least as complex as an earthworm, a dent forms in one side of the early, spheroidal embryo. This dent, the blastopore, deepens to become the archenteron, the first phase in the growth of the gut. In deuterostomes (including humans), the original dent becomes the anus, while the gut eventually tunnels through the embryo until it reaches the other side, forming an opening that becomes the mouth.It was originally thought that the blastopore of the protostomes formed the mouth, and the anus was formed second when the gut tunneled through the embryo. More recent research has shown that our understanding of protostome mouth formation is somewhat less secure than we had thought. The edges of the dent appear to move together and close up in the middle, leaving openings at the ends which become the mouth and anus.However, this idea has been challenged, because the Acoelomorpha, which form a sister group to the rest of the bilaterian animals, have a single mouth which leads into a blind gut (with no anus). The genes employed in the embryonic construction of the flatworm mouth are the same as those expressed around the protostomes', which suggests that the two structures are equivalent, and that the older ideas about protostome mouth formation were correct. An alternative way to develop two openings from the blastopore during gastrulation, called amphistomy, appears to exist as well in animals like nematodes.".
- Embryological_origins_of_the_mouth_and_anus thumbnail Protovsdeuterostomes.svg?width=300.
- Embryological_origins_of_the_mouth_and_anus wikiPageID "20533354".
- Embryological_origins_of_the_mouth_and_anus wikiPageLength "6596".
- Embryological_origins_of_the_mouth_and_anus wikiPageOutDegree "31".
- Embryological_origins_of_the_mouth_and_anus wikiPageRevisionID "639698917".
- Embryological_origins_of_the_mouth_and_anus wikiPageWikiLink Acoelomorpha.
- Embryological_origins_of_the_mouth_and_anus wikiPageWikiLink Amphistomy.
- Embryological_origins_of_the_mouth_and_anus wikiPageWikiLink Archenteron.
- Embryological_origins_of_the_mouth_and_anus wikiPageWikiLink Bilateria.
- Embryological_origins_of_the_mouth_and_anus wikiPageWikiLink Blastopore.
- Embryological_origins_of_the_mouth_and_anus wikiPageWikiLink Category:Digestive_system.
- Embryological_origins_of_the_mouth_and_anus wikiPageWikiLink Category:Embryology_of_digestive_system.
- Embryological_origins_of_the_mouth_and_anus wikiPageWikiLink Category:Mouth.
- Embryological_origins_of_the_mouth_and_anus wikiPageWikiLink Clade.
- Embryological_origins_of_the_mouth_and_anus wikiPageWikiLink Cnidaria.
- Embryological_origins_of_the_mouth_and_anus wikiPageWikiLink Cnidarian.
- Embryological_origins_of_the_mouth_and_anus wikiPageWikiLink Deuterostome.
- Embryological_origins_of_the_mouth_and_anus wikiPageWikiLink Earthworm.
- Embryological_origins_of_the_mouth_and_anus wikiPageWikiLink Embryo.
- Embryological_origins_of_the_mouth_and_anus wikiPageWikiLink Embryology.
- Embryological_origins_of_the_mouth_and_anus wikiPageWikiLink Flatworm.
- Embryological_origins_of_the_mouth_and_anus wikiPageWikiLink Gastrulation.
- Embryological_origins_of_the_mouth_and_anus wikiPageWikiLink Gut_(anatomy).
- Embryological_origins_of_the_mouth_and_anus wikiPageWikiLink Gut_(zoology).
- Embryological_origins_of_the_mouth_and_anus wikiPageWikiLink Nematode.
- Embryological_origins_of_the_mouth_and_anus wikiPageWikiLink Protostome.
- Embryological_origins_of_the_mouth_and_anus wikiPageWikiLink Protostomes.
- Embryological_origins_of_the_mouth_and_anus wikiPageWikiLink Sphere.
- Embryological_origins_of_the_mouth_and_anus wikiPageWikiLink Urbilaterian.
- Embryological_origins_of_the_mouth_and_anus wikiPageWikiLink File:Protovsdeuterostomes.svg.
- Embryological_origins_of_the_mouth_and_anus wikiPageWikiLinkText "Embryological origins of the mouth and anus".
- Embryological_origins_of_the_mouth_and_anus wikiPageWikiLinkText "distinction between".
- Embryological_origins_of_the_mouth_and_anus hasPhotoCollection Embryological_origins_of_the_mouth_and_anus.
- Embryological_origins_of_the_mouth_and_anus wikiPageUsesTemplate Template:Cladogram.
- Embryological_origins_of_the_mouth_and_anus wikiPageUsesTemplate Template:Expert.
- Embryological_origins_of_the_mouth_and_anus wikiPageUsesTemplate Template:Expert-subject.
- Embryological_origins_of_the_mouth_and_anus wikiPageUsesTemplate Template:Reflist.
- Embryological_origins_of_the_mouth_and_anus subject Category:Digestive_system.
- Embryological_origins_of_the_mouth_and_anus subject Category:Embryology_of_digestive_system.
- Embryological_origins_of_the_mouth_and_anus subject Category:Mouth.
- Embryological_origins_of_the_mouth_and_anus hypernym Characteristic.
- Embryological_origins_of_the_mouth_and_anus type Article.
- Embryological_origins_of_the_mouth_and_anus type Food.
- Embryological_origins_of_the_mouth_and_anus type Article.
- Embryological_origins_of_the_mouth_and_anus type Feature.
- Embryological_origins_of_the_mouth_and_anus comment "The embryological origin of the mouth and anus is an important characteristic, and forms the morphological basis for separating bilaterian animals into two natural groupings: the protostomes and deuterostomes.In animals at least as complex as an earthworm, a dent forms in one side of the early, spheroidal embryo. This dent, the blastopore, deepens to become the archenteron, the first phase in the growth of the gut.".
- Embryological_origins_of_the_mouth_and_anus label "Embryological origins of the mouth and anus".
- Embryological_origins_of_the_mouth_and_anus sameAs m.011b94vv.
- Embryological_origins_of_the_mouth_and_anus sameAs Q5370228.
- Embryological_origins_of_the_mouth_and_anus sameAs Q5370228.
- Embryological_origins_of_the_mouth_and_anus wasDerivedFrom Embryological_origins_of_the_mouth_and_anus?oldid=639698917.
- Embryological_origins_of_the_mouth_and_anus depiction Protovsdeuterostomes.svg.
- Embryological_origins_of_the_mouth_and_anus isPrimaryTopicOf Embryological_origins_of_the_mouth_and_anus.