{"id":10843,"date":"2018-04-23T08:00:55","date_gmt":"2018-04-23T06:00:55","guid":{"rendered":"https:\/\/codexvirtualis.fr\/codex\/?p=10843"},"modified":"2018-05-01T11:35:11","modified_gmt":"2018-05-01T09:35:11","slug":"semaine-17-2018","status":"publish","type":"post","link":"https:\/\/codexvirtualis.fr\/codex\/semaine-17-2018","title":{"rendered":"Semaine 17-2018"},"content":{"rendered":"

Une citation<\/h2>\n

\u00ab\u00a0L’exp\u00e9rience n’est pas ce qui am\u00e8ne \u00e0 un homme\u00a0; c’est ce qu’un homme fait devant ce qui lui arrive.\u00a0\u00bb<\/p>\n

A. Huxley<\/p>\n

  <\/p>\n

Une image<\/h2>\n
\"Quel<\/a>
Quel est cet organe ?<\/figcaption><\/figure>\n

  <\/p>\n

Voir l’image de plus grande taille<\/a><\/p>\n

  <\/p>\n

Voir l’image l\u00e9gend\u00e9e<\/a><\/p>\n

  <\/p>\n

L’image de la semaine 17-2018 est le r\u00e9sultat de l’observation d’une coupe histologique \u00e0 l’objectif x40 du microscope photonique.<\/p>\n

Elle repr\u00e9sente principalement des structures fibreuses enchev\u00eatr\u00e9es, bord\u00e9es \u00e0 droite par de multiples unit\u00e9s circulaires ou ovales.<\/p>\n

  <\/p>\n

Les structures situ\u00e9es \u00e0 droite de l’image contiennent g\u00e9n\u00e9ralement une unit\u00e9 circulaire, peu color\u00e9e et pr\u00e9sentant de multiples granules.
\nIl s’agit de corps cellulaires comportant un noyau central ou l\u00e9g\u00e8rement excentr\u00e9, baignant dans un cytoplasme granuleux intens\u00e9ment color\u00e9.
\nLe r\u00e9seau fibreux correspond aux prolongements de ces cellules \u00e9troitement m\u00eal\u00e9s.<\/p>\n

  <\/p>\n

Cette organisation est caract\u00e9ristique du syst\u00e8me nerveux central des animaux non Vert\u00e9br\u00e9s.
\nIl est form\u00e9 de ganglions nerveux pr\u00e9sents \u00e0 raison d’une paire par m\u00e9tam\u00e8re<\/a> chez les animaux m\u00e9tam\u00e9ris\u00e9s, reli\u00e9s par des commissures, et associ\u00e9s \u00e0 leurs homologues des m\u00e9tam\u00e8res voisins par des connectifs. Il constitue une cha\u00eene nerveuse ventrale, prolong\u00e9e \u00e0 l’avant par deux ganglions c\u00e9r\u00e9bro\u00efdes localis\u00e9s en position dorsale par rapport au tube digestif.<\/p>\n

Dans les ganglions sont situ\u00e9s des corps cellulaires de neurones, en p\u00e9riph\u00e9rie, et des prolongements nerveux, au centre. Ils forment le neuropile<\/a>, si\u00e8ge de nombreuses synapses, organis\u00e9 en amas distincts.<\/p>\n

  <\/p>\n

En l’occurrence, l’image correspond \u00e0 une section de ganglion c\u00e9r\u00e9bro\u00efde de Lombric ou Ver de terre.
\nLes articles des semaines 15-2018<\/a> et 16-2018<\/a> de Codex virtualis d\u00e9crivent leur organisation.<\/p>\n

  <\/p>\n

Pour en savoir plus, consulter :<\/p>\n

• <\/span>les pages Premiers pas histologiques<\/a> de Codex virtualis (adresse : http:\/\/codexvirtualis.fr\/codex\/de-lorganisation-interne\/premiers-pas-histologiques)<\/p>\n

• <\/span> Burkitt H.G., Young B., Heath J.W., 1993 \u2013 Histologie fonctionnelle Wheater. Arnette, 408p. Paris<\/p>\n

• <\/span>Heusser S., Dupuy H.G., 2015 \u2013 Atlas biologie animale. Dunod, 220p. Paris<\/p>\n

  <\/p>\n

\n","protected":false},"excerpt":{"rendered":"

Une citation \u00ab\u00a0L’exp\u00e9rience n’est pas ce qui am\u00e8ne \u00e0 un homme\u00a0; c’est ce qu’un homme fait devant ce qui lui arrive.\u00a0\u00bb A. Huxley   Une image   Voir l’image de plus grande taille   Voir l’image l\u00e9gend\u00e9e   L’image de la semaine 17-2018 est le r\u00e9sultat de l’observation d’une coupe histologique \u00e0 l’objectif x40 du […]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","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":"","jetpack_post_was_ever_published":false},"categories":[1],"tags":[47,14,23,22],"class_list":["post-10843","post","type-post","status-publish","format-standard","hentry","category-a-la-une","tag-annelide","tag-histologie","tag-observation","tag-physiologie"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\n\t\n\t\t