{"id":13298,"date":"2020-12-24T18:28:53","date_gmt":"2020-12-24T17:28:53","guid":{"rendered":"https:\/\/codexvirtualis.fr\/codex\/?page_id=13298"},"modified":"2021-07-31T18:42:49","modified_gmt":"2021-07-31T16:42:49","slug":"la-metamerie-des-animaux-conclusion","status":"publish","type":"page","link":"https:\/\/codexvirtualis.fr\/codex\/petites-questions-de-physiologie\/petites-questions-de-physiologie-animale-2019-ouvrage\/la-metamerie-des-animaux-conclusion","title":{"rendered":"La m\u00e9tam\u00e9rie des animaux : conclusion"},"content":{"rendered":"<br \/>\n<header>\n<table style=\"width: 100%; \">\n<tr>\n<th style=\"text-align: center; \" colspan=\"3\">Conclusion<\/th>\n<\/tr>\n<tr>\n<td style=\"width: 20%; text-align: left; \">\n<a href=\"\/codex\/petites-questions-de-physiologie\/petites-questions-de-physiologie-animale-2019-ouvrage\/la-metamerie-un-fonctionnement-segmentaire-et-coordonne-de-lorganisme\" title=\"La m\u00e9tam\u00e9rie : un fonctionnement segmentaire et coordonn\u00e9 de l\u2019organisme\">Pr\u00e9c\u00e9dent<\/a><\/td>\n<th style=\"width: 60%; text-align: center; \">La m\u00e9tam\u00e9rie des animaux<\/th>\n<td style=\"width: 20%; text-align: right; \"><a href=\"\/codex\/petites-questions-de-physiologie\/petites-questions-de-physiologie-animale-2019-ouvrage\/la-metamerie-des-animaux-bibliographie-et-sitographie\" title=\"La m\u00e9tam\u00e9rie des animaux : bibliographie et sitographie\">Suivant<\/a>\n <\/td>\n<\/tr>\n<\/table>\n<hr \/>\n<\/header>\n<p> &nbsp; <\/p>\n<section class=\"sect1\" id=\"d0e709\">\n<p>La m\u00e9tam\u00e9rie est une caract\u00e9ristique du plan d&rsquo;organisation rencontr\u00e9e dans divers groupes animaux.<\/p>\n<p>Elle consiste en une division du corps en unit\u00e9s r\u00e9p\u00e9t\u00e9es le long de l&rsquo;axe ant\u00e9ropost\u00e9rieur, les m\u00e9tam\u00e8res. Chaque m\u00e9tam\u00e8re comporte une paire de cavit\u00e9s liquidiennes d&rsquo;origine m\u00e9sodermique, les cavit\u00e9s c\u0153lomiques.  Certains organes sont pr\u00e9sents dans chaque m\u00e9tam\u00e8re, comme les organes excr\u00e9teurs, les muscles, les ganglions nerveux, les vaisseaux sanguins voire les gonades. <\/p>\n<p>Une telle organisation permet un fonctionnement autonome des m\u00e9tam\u00e8res, mais implique une coordination de leurs activit\u00e9s \u00e0 l&rsquo;\u00e9chelle de l&rsquo;organisme.<\/p>\n<p>Les exemples des Ann\u00e9lides, des Euarthropodes et des Chord\u00e9s montrent que la m\u00e9tam\u00e9rie pr\u00e9sente une relative diversit\u00e9. Elle est bien marqu\u00e9e chez les premiers, alt\u00e9r\u00e9e par la r\u00e9gionalisation corporelle chez les deuxi\u00e8mes et peu manifeste chez les derniers.<\/p>\n<p>Pour autant, l&rsquo;existence de la m\u00e9tam\u00e9rie dans ces trois groupes appartenant \u00e0 deux branches diff\u00e9rentes des Bilat\u00e9riens, les Protostomiens et les Deut\u00e9rostomiens,  pose le probl\u00e8me de son origine. Deux hypoth\u00e8ses sont possibles : soit la m\u00e9tam\u00e9rie est apparue plusieurs fois au cours de l&rsquo;\u00e9volution des Bilat\u00e9riens, soit elle est apparue chez l&rsquo;anc\u00eatre commun des Bilat\u00e9riens. Cet anc\u00eatre m\u00e9tam\u00e9ris\u00e9 hypoth\u00e9tique a \u00e9t\u00e9 baptis\u00e9  <span class=\"italic\">Urbilateria<\/span>.<\/p>\n<\/section>\n<p> &nbsp; <\/p>\n<footer>\n<hr \/>\n<table style=\"width: 100%; \">\n<tr>\n<td style=\"width: 40%; text-align: left; \">\n<a href=\"\/codex\/petites-questions-de-physiologie\/petites-questions-de-physiologie-animale-2019-ouvrage\/la-metamerie-un-fonctionnement-segmentaire-et-coordonne-de-lorganisme\" title=\"La m\u00e9tam\u00e9rie : un fonctionnement segmentaire et coordonn\u00e9 de l\u2019organisme\">Pr\u00e9c\u00e9dent<\/a>\u00a0<\/td>\n<td style=\"width: 20%; text-align: center; \">\n<a href=\"\/codex\/petites-questions-de-physiologie\/petites-questions-de-physiologie-animale-2019-ouvrage\/la-metamerie-des-animaux-introduction\" title=\"La m\u00e9tam\u00e9rie des animaux : introduction\">Niveau sup\u00e9rieur<\/a>\n <\/td>\n<td style=\"width: 40%; text-align: right; \">\u00a0<br \/>\n<a href=\"\/codex\/petites-questions-de-physiologie\/petites-questions-de-physiologie-animale-2019-ouvrage\/la-metamerie-des-animaux-bibliographie-et-sitographie\" title=\"La m\u00e9tam\u00e9rie des animaux : bibliographie et sitographie\">Suivant<\/a>\n<\/td>\n<\/tr>\n<tr>\n<td style=\"width: 40%; text-align: left; vertical-align: top; \">La m\u00e9tam\u00e9rie : un fonctionnement segmentaire et coordonn\u00e9 de l&rsquo;organisme\u00a0<\/td>\n<td style=\"width: 20%; text-align: center; \">\n<a href=\"\/codex\/petites-questions-de-physiologie\/petites-questions-de-physiologie-animale-2019-ouvrage\" title=\"Petites questions de physiologie animale 2019 : ouvrage\">Sommaire<\/a>\n<\/td>\n<td style=\"width: 40%; text-align: right; vertical-align: top; \">\u00a0Bibliographie et sitographie<\/td>\n<\/tr>\n<\/table>\n<\/footer>\n","protected":false},"excerpt":{"rendered":"<p>Conclusion Pr\u00e9c\u00e9dent La m\u00e9tam\u00e9rie des animaux Suivant &nbsp; La m\u00e9tam\u00e9rie est une caract\u00e9ristique du plan d&rsquo;organisation rencontr\u00e9e dans divers groupes animaux. Elle consiste en une division du corps en unit\u00e9s r\u00e9p\u00e9t\u00e9es le long de l&rsquo;axe ant\u00e9ropost\u00e9rieur, les m\u00e9tam\u00e8res. Chaque m\u00e9tam\u00e8re comporte une paire de cavit\u00e9s liquidiennes d&rsquo;origine m\u00e9sodermique, les cavit\u00e9s c\u0153lomiques. Certains organes sont pr\u00e9sents [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":0,"parent":13169,"menu_order":6,"comment_status":"closed","ping_status":"closed","template":"","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"class_list":["post-13298","page","type-page","status-publish","hentry"],"aioseo_notices":[],"jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/codexvirtualis.fr\/codex\/wp-json\/wp\/v2\/pages\/13298","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/codexvirtualis.fr\/codex\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/codexvirtualis.fr\/codex\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/codexvirtualis.fr\/codex\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/codexvirtualis.fr\/codex\/wp-json\/wp\/v2\/comments?post=13298"}],"version-history":[{"count":5,"href":"https:\/\/codexvirtualis.fr\/codex\/wp-json\/wp\/v2\/pages\/13298\/revisions"}],"predecessor-version":[{"id":13327,"href":"https:\/\/codexvirtualis.fr\/codex\/wp-json\/wp\/v2\/pages\/13298\/revisions\/13327"}],"up":[{"embeddable":true,"href":"https:\/\/codexvirtualis.fr\/codex\/wp-json\/wp\/v2\/pages\/13169"}],"wp:attachment":[{"href":"https:\/\/codexvirtualis.fr\/codex\/wp-json\/wp\/v2\/media?parent=13298"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}