{"id":11778,"date":"2019-02-04T08:00:38","date_gmt":"2019-02-04T07:00:38","guid":{"rendered":"https:\/\/codexvirtualis.fr\/codex\/?p=11778"},"modified":"2019-02-04T11:32:25","modified_gmt":"2019-02-04T10:32:25","slug":"semaine-06-2019","status":"publish","type":"post","link":"https:\/\/codexvirtualis.fr\/codex\/semaine-06-2019","title":{"rendered":"Semaine 06-2019"},"content":{"rendered":"<h2>Une citation<\/h2>\n<p>\u00ab\u00a0La question n&rsquo;est pas ce que nous apportera demain mais ce que nous a apport\u00e9 la veille.\u00a0\u00bb<\/p>\n<p>Sandor<\/p>\n<p> &nbsp; <\/p>\n<h2>Une image<\/h2>\n<figure style=\"width: 300px\" class=\"wp-caption alignnone\"><a rel=\"lightbox\" href=\"\/documents\/images\/histologie_articles\/testicule\/lombric_ct_genital_male_an05_spermiducte_08-WEB.jpg\"><img decoding=\"async\" src=\"\/documents\/images\/histologie_articles\/testicule\/lombric_ct_genital_male_an05_spermiducte_08-WEB.jpg\" width=\"300\" \" alt=\"Quel est cet organe ?\" class=\"size-medium\" \/><figcaption class=\"wp-caption-text\">Quel est cet organe ?<\/figcaption><\/figure>\n<p> &nbsp; <\/p>\n<p style=\"text-align: right;\"><a rel=\"lightbox\" href=\"\/images\/albums\/delices-histologiques\/annelide-adulte\/appareil-reproducteur\/lombric_ct_genital_male_an05_spermiducte_08_zp.jpg\" target=\"_blank\">Voir l&rsquo;image de plus grande taille<\/a><\/p>\n<p> &nbsp; <\/p>\n<p style=\"text-align: right;\"><a rel=\"lightbox\" href=\"\/documents\/images\/histologie_articles\/testicule\/lombric_ct_genital_male_an05_spermiducte_08_legende.jpg\" target=\"_blank\">Voir l&rsquo;image l\u00e9gend\u00e9e<\/a><\/p>\n<p> &nbsp; <\/p>\n<p>L&rsquo;image de la semaine 06-2019 r\u00e9sulte de l&rsquo;observation d&rsquo;une coupe histologique \u00e0 l&rsquo;objectif x40 du microscope photonique.<\/p>\n<p>Elle comporte une structure formant une bande repli\u00e9e, ouverte sur un espace dans lequel des amas composites sont pr\u00e9sents.<\/p>\n<p> &nbsp; <\/p>\n<p>Les amas composites sont constitu\u00e9s d&rsquo;une masse centrale finement granuleuse autour de laquelle des unit\u00e9s sombres et ponctu\u00e9es sont dispos\u00e9es en cercle. D&rsquo;organisation similaire au sein d&rsquo;un amas, elles poss\u00e8dent des formes et des dimensions diff\u00e9rentes d&rsquo;un amas \u00e0 l&rsquo;autre.<\/p>\n<p>Il s&rsquo;agit vraisemblablement de noyaux de <\/a><a href=\"\/codex\/glossaire\/glossaire-de-a-a-c#cellule\" target=\"_blank\">cellules<\/a> animales \u00e0 diff\u00e9rents stades d&rsquo;une \u00e9volution.<\/p>\n<p>Cette organisation est caract\u00e9ristique des v\u00e9sicules s\u00e9minales de Lombric d\u00e9crites dans les articles des semaines <a href=\"\/codex\/semaine-03-2019\">03-2019<\/a>, <a href=\"\/codex\/semaine-04-2019\">04-2019<\/a> et <a href=\"\/codex\/semaine-05-2019\">05-2019<\/a> de Codex virtualis.<br \/>\nR\u00e9gions sp\u00e9cialis\u00e9es des cavit\u00e9s <a href=\"\/codex\/glossaire\/glossaire-de-a-a-c#coelomique\" target=\"_blank\">c\u0153lomiques<\/a>, elles sont le si\u00e8ge des principales \u00e9tapes de la <a href=\"\/codex\/glossaire\/glossaire-de-p-a-s#spermatogenese\" target=\"_blank\">spermatogen\u00e8se<\/a>, production des <a href=\"\/codex\/glossaire\/glossaire-de-d-a-h#gamete\" target=\"_blank\">gam\u00e8tes<\/a> m\u00e2les, les <a href=\"\/codex\/glossaire\/glossaire-de-p-a-s#spermatozoide\" target=\"_blank\">spermatozoides<\/a>.<\/p>\n<p>Les groupes de cellules correspondent \u00e0 des spermatosph\u00e8res, comportant un blastophore central. Ils comportent des cellules <a href=\"\/codex\/glossaire\/glossaire-de-d-a-h#germinal\" target=\"_blank\">germinales<\/a> \u00e0 diff\u00e9rents stades de la spermatogen\u00e8se.<\/p>\n<p> &nbsp; <\/p>\n<p>La bande repli\u00e9e est form\u00e9e par une unique couche de cellules allong\u00e9es et poss\u00e9dant un noyau ovale. Elles constituent un <a href=\"\/codex\/glossaire\/glossaire-de-d-a-h#epithelium\" target=\"_blank\">\u00e9pith\u00e9lium<\/a> simple et prismatique. Leur <a href=\"\/codex\/glossaire\/glossaire-de-a-a-c#apex\" target=\"_blank\">apex<\/a> pr\u00e9sente une bordure irr\u00e9guli\u00e8re, vraisemblablement <a href=\"\/codex\/glossaire\/glossaire-de-a-a-c#cilie_a\" target=\"_blank\">cili\u00e9e<\/a>.<\/p>\n<p>Ouverte sur la v\u00e9sicule s\u00e9minale, la lumi\u00e8re bord\u00e9e par cet \u00e9pith\u00e9lium contient des groupes de cellules tr\u00e8s longues et fines munies d&rsquo;un noyau \u00e9galement long et \u00e9troit. Semblant adh\u00e9rer \u00e0 l&rsquo;apex des cellules \u00e9pith\u00e9liales, il s&rsquo;agit de spermatozo\u00efdes. <\/p>\n<p>Au terme de la spermatogen\u00e8se, les spermatozo\u00efdes du Lombric quittent la v\u00e9sicule s\u00e9minale et entrent dans un conduit appel\u00e9 spermiducte, \u00e0 la faveur d&rsquo;un pavillon cili\u00e9, \u00e9galement appel\u00e9 entonnoir.<\/p>\n<p>La v\u00e9sicule s\u00e9minale \u00e9tant une r\u00e9gion sp\u00e9cialis\u00e9e d&rsquo;une cavit\u00e9 c\u0153lomique, le spermiducte correspond \u00e0 un <a href=\"\/codex\/glossaire\/glossaire-de-a-a-c#coelomoducte\" target=\"_blank\">c\u0153lomoducte<\/a> \u00e0 fonction <a href=\"\/codex\/glossaire\/glossaire-de-d-a-h#genital\" target=\"_blank\">g\u00e9nitale<\/a>.<br \/>\nIl est ouvert d&rsquo;une part sur la v\u00e9sicule s\u00e9minale et d&rsquo;autre part sur l&rsquo;ext\u00e9rieur au niveau des orifices g\u00e9nitaux m\u00e2les, pr\u00e9sents sur la face ventrale du quinzi\u00e8me segment corporel.<\/p>\n<p> &nbsp; <\/p>\n<p>L&rsquo;<a href=\"\/codex\/glossaire\/glossaire-de-a-a-c#appareil\" target=\"_blank\">appareil<\/a> g\u00e9nital m\u00e2le du Lombric, d\u00e9crit dans les articles des semaines <a href=\"\/codex\/semaine-50-2018\">50-2018<\/a> et <a href=\"\/codex\/semaine-51-2018\">51-2018<\/a>, est ainsi form\u00e9 de deux paires de testicules log\u00e9s dans des sacs testiculaires, situ\u00e9s dans les segments 10 et 11.<br \/>\nIls produisent des <a href=\"\/codex\/glossaire\/glossaire-de-p-a-s#spermatogonie\" target=\"_blank\">spermatogonies<\/a> et les lib\u00e8rent dans des v\u00e9sicules s\u00e9minales.<br \/>\nDeux paires de v\u00e9sicules s\u00e9minales sont en relation avec le sac testiculaire du segment 10 et une avec celui du segment 11. Les spermatogonies y \u00e9voluent en spermatozo\u00efdes.<br \/>\nUn spermiducte est ouvert dans chaque sac testiculaire, par un pavillon cili\u00e9. Les spermiductes d&rsquo;un m\u00eame c\u00f4t\u00e9 convergent en un unique conduit dans le segment 11. Il est ouvert sur l&rsquo;ext\u00e9rieur par un pore g\u00e9nital dans le segment 15.<br \/>\nLes spermatozo\u00efdes empruntent les spermiductes qui les acheminent vers les pores gr\u00e2ce auxquels ils sont transmis au partenaire lors de l&rsquo;accouplement.<\/p>\n<p> &nbsp; <\/p>\n<p>Pour en savoir plus, consulter :<\/p>\n<p><span style=\"color: #999999;\">&bull; <\/span>les pages <a href=\"\/codex\/de-lorganisation-interne\/premiers-pas-histologiques\">Premiers pas histologiques<\/a> de Codex virtualis (adresse : http:\/\/codexvirtualis.fr\/codex\/de-lorganisation-interne\/premiers-pas-histologiques)<\/p>\n<p><span style=\"color: #999999;\">&bull; <\/span>Burkitt H.G., Young B., Heath J.W., 1993 \u2013 Histologie fonctionnelle Wheater. Arnette, 408p. Paris<\/p>\n<p><span style=\"color: #999999;\">&bull; <\/span>Calkins G. N., 1895 &#8211; <a href=\"https:\/\/onlinelibrary.wiley.com\/doi\/abs\/10.1002\/jmor.1050110203\" target=\"_blank\">The spermatogenesis of Lumbricus.<\/a> Journal of morphology, 11, 2 : 271-302 (adresse&nbsp;: https:\/\/onlinelibrary.wiley.com\/doi\/abs\/10.1002\/jmor.1050110203)<br \/>\n<a href=\"https:\/\/doi.org\/10.1002\/jmor.1050110203 \" target=\"_blank\">DOI : 10.1002\/jmor.1050110203<\/a><\/p>\n<p><span style=\"color: #999999;\">&bull; <\/span>Heusser S., Dupuy H.G., 2015 \u2013 Atlas biologie animale. Dunod, 220p. Paris<\/p>\n<p><span style=\"color: #999999;\">&bull; <\/span>Leake L. D., 1975 \u2013 Comparative histology, an introduction to the microscopic structure of animals. Academic press, 738p. London, New York, San Francisco<\/p>\n<p> &nbsp; <\/p>\n<hr \/>\n","protected":false},"excerpt":{"rendered":"<p>Une citation \u00ab\u00a0La question n&rsquo;est pas ce que nous apportera demain mais ce que nous a apport\u00e9 la veille.\u00a0\u00bb Sandor &nbsp; Une image &nbsp; Voir l&rsquo;image de plus grande taille &nbsp; Voir l&rsquo;image l\u00e9gend\u00e9e &nbsp; L&rsquo;image de la semaine 06-2019 r\u00e9sulte de l&rsquo;observation d&rsquo;une coupe histologique \u00e0 l&rsquo;objectif x40 du microscope photonique. Elle comporte une [&hellip;]<\/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-11778","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<!-- All in One SEO 5.0.0.1 - aioseo.com -->\n\t<meta name=\"description\" content=\"V\u00e9sicule s\u00e9minale de Lombric avec stades de spermatogen\u00e8se (spermatides en spermiogen\u00e8se, spermatocytes I et II) et pavillon du spermiducte (c\u0153lomoducte)\" \/>\n\t<meta name=\"robots\" content=\"max-image-preview:large\" \/>\n\t<meta name=\"author\" content=\"S. 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