https://wiki.tiffa.net/w/index.php?action=history&feed=atom&title=Translations%3AGastrointestinal_tract%2F41%2FenTranslations:Gastrointestinal tract/41/en - Revision history2026-09-14T11:48:15ZRevision history for this page on the wikiMediaWiki 1.43.0https://wiki.tiffa.net/w/index.php?title=Translations:Gastrointestinal_tract/41/en&diff=131009&oldid=prevFuzzyBot: Importing a new version from external source2024-03-22T03:59:14Z<p>Importing a new version from external source</p>
<p><b>New page</b></p><div>A through-gut (one with both mouth and anus) is thought to have evolved within the [[nephrozoa]]n clade of [[Bilateria]], after their ancestral ventral orifice (single, as in [[cnidaria]]ns and [[xenacoelomorpha|acoels]]; re-evolved in nephrozoans like [[flatworms]]) stretched antero-posteriorly, before the middle part of the stretch would get narrower and closed fully, leaving an anterior orifice (mouth) and a posterior orifice (anus plus [[Gonopore|genital opening]]). A stretched gut without the middle part closed is present in another branch of bilaterians, the extinct [[proarticulata|proarticulates]]. This and the [[embryological origins of the mouth and anus|amphistomic]] development (when both mouth and anus develop from the gut stretch in the embryo) present in some nephrozoans (e.g. [[roundworms]]) are considered to support this hypothesis.</div>FuzzyBot