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{"version":"1.0","provider_name":"Animalia","provider_url":"https:\/\/animalia.univ-tours.fr","author_name":"vaggarath","author_url":"https:\/\/animalia.univ-tours.fr\/author\/vaggarath\/","title":"Membre chiridien - Animalia","type":"rich","width":600,"height":338,"html":"

Membre chiridien<\/a><\/blockquote><\/iframe><script type=\"text\/javascript\">\n\/* <![CDATA[ *\/\n\/*! This file is auto-generated *\/\n!function(d,l){\"use strict\";l.querySelector&&d.addEventListener&&\"undefined\"!=typeof URL&&(d.wp=d.wp||{},d.wp.receiveEmbedMessage||(d.wp.receiveEmbedMessage=function(e){var t=e.data;if((t||t.secret||t.message||t.value)&&!\/[^a-zA-Z0-9]\/.test(t.secret)){for(var s,r,n,a=l.querySelectorAll('iframe[data-secret=\"'+t.secret+'\"]'),o=l.querySelectorAll('blockquote[data-secret=\"'+t.secret+'\"]'),c=new RegExp(\"^https?:$\",\"i\"),i=0;i<o.length;i++)o[i].style.display=\"none\";for(i=0;i<a.length;i++)s=a[i],e.source===s.contentWindow&&(s.removeAttribute(\"style\"),\"height\"===t.message?(1e3<(r=parseInt(t.value,10))?r=1e3:~~r<200&&(r=200),s.height=r):\"link\"===t.message&&(r=new URL(s.getAttribute(\"src\")),n=new URL(t.value),c.test(n.protocol))&&n.host===r.host&&l.activeElement===s&&(d.top.location.href=t.value))}},d.addEventListener(\"message\",d.wp.receiveEmbedMessage,!1),l.addEventListener(\"DOMContentLoaded\",function(){for(var e,t,s=l.querySelectorAll(\"iframe.wp-embedded-content\"),r=0;r<s.length;r++)(t=(e=s[r]).getAttribute(\"data-secret\"))||(t=Math.random().toString(36).substring(2,12),e.src+=\"#?secret=\"+t,e.setAttribute(\"data-secret\",t)),e.contentWindow.postMessage({message:\"ready\",secret:t},\"*\")},!1)))}(window,document);\n\/\/# sourceURL=https:\/\/animalia.univ-tours.fr\/wp-includes\/js\/wp-embed.min.js\n\/* ]]> *\/\n<\/script>\n","thumbnail_url":"https:\/\/animalia.univ-tours.fr\/wp-content\/uploads\/2022\/05\/membre-chiridien.png","thumbnail_width":1386,"thumbnail_height":1705,"description":"Le Chiridium (ou chyropt\u00e9rygium) = membre chiridien ou pentadactyle Les membres des t\u00e9trapodes sont de type chiridien. Ils deviennent pluriarticul\u00e9s pour soulever le corps et amplifier la force n\u00e9cessaire \u00e0 la locomotion. Il y a trois segments. 1- Le stylopode Il est form\u00e9 d\u2019un seul os : l\u2019hum\u00e9rus pour le membre ant\u00e9rieur et le f\u00e9mur pour le post\u00e9rieur. Cet os s\u2019articule gr\u00e2ce au coude ou au genou. 2- Le zeugopode Il est form\u00e9 de deux os : le radius et l\u2019ulna pour le membre ant\u00e9rieur, le tibia et le p\u00e9ron\u00e9 pour le membre post\u00e9rieur. Ces os s\u2019articulent avec l\u2019autopode gr\u00e2ce au poignet ou \u00e0 la cheville. 3- L\u2019autopode C\u2019est la main ou le pied. Sa structure est pluriarticul\u00e9e et tr\u00e8s complexe. Le basipode (poignet ou cheville) : il est form\u00e9 de trois rang\u00e9es d\u2019os nomm\u00e9s en fonction des os du zeugopode. Pour le membre ant\u00e9rieur, il y a : le radial, l\u2019interm\u00e9diaire et le cubital. Pour le membre post\u00e9rieur, il y a : le p\u00e9ron\u00e9al (calcan\u00e9um), l\u2019interm\u00e9diaire et le tibial (os tragal). Ensuite, il y a les os centraux (de 0 \u00e0 5 os). Enfin, il y a 5 carpiens (pour la main) ou 5 tarsiens (pour le pied). Le m\u00e9tapode : Il est repr\u00e9sent\u00e9 par la paume de la main ou par la plante du pied. Ce m\u00e9tapode est compos\u00e9 de 5 m\u00e9tacarpiens ou m\u00e9tatarsiens. L\u2019acropode : Il est repr\u00e9sent\u00e9 par les doigts ou par les orteils. Chaque partie est compos\u00e9e d\u2019une succession d\u2019os (les phalanges) articul\u00e9s entre eux. Les phalanges \u00e9taient nombreuses au d\u00e9part mais ont maintenant une tendance \u00e0 la r\u00e9duction. Chez les mammif\u00e8res, le doigt 1 (le pouce) a deux phalanges, les doigts 2 \u00e0 5 ont tous trois phalanges. De l\u2019int\u00e9rieur vers l\u2019ext\u00e9rieur, on trouve la phalange, la phalangine et la phalangette. Dans le cas du pouce, c\u2019est la phalangine qui dispara\u00eet."}