{"id":11181,"date":"2018-07-16T08:00:43","date_gmt":"2018-07-16T06:00:43","guid":{"rendered":"https:\/\/codexvirtualis.fr\/codex\/?p=11181"},"modified":"2018-07-09T21:32:12","modified_gmt":"2018-07-09T19:32:12","slug":"semaine-29-2018","status":"publish","type":"post","link":"https:\/\/codexvirtualis.fr\/codex\/semaine-29-2018","title":{"rendered":"Semaine 29-2018"},"content":{"rendered":"

Une citation<\/h2>\n

\u00ab\u00a0On ne peut comprendre la vie qu’en regardant en arri\u00e8re\u00a0; on ne peut la vivre qu’en regardant en avant.\u00a0\u00bb<\/p>\n

S. Kierkegaard<\/p>\n

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

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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 29-2018 r\u00e9sulte de l’observation d’une coupe histologique \u00e0 l’objectif x40 du microscope photonique.<\/p>\n

Elle appara\u00eet form\u00e9e de deux types de structures :<\/p>\n

• <\/span>intens\u00e9ment color\u00e9es, fibreuses ou ovales ;<\/p>\n

• <\/span>faiblement color\u00e9es, de forme mal d\u00e9finie, \u00e0 contenu vacuolis\u00e9.<\/p>\n

  <\/p>\n

Les unit\u00e9s fortement color\u00e9es, allong\u00e9es ou ovales, sont de taille relativement importante. Certaines contiennent une structure ovale ponctu\u00e9e, correspondant \u00e0 un noyau. Il est entour\u00e9 d’une masse homog\u00e8ne. L’ensemble correspond \u00e0 une cellule.
\nLeur forme ainsi que leur organisation laisse \u00e0 penser qu’il s’agit de fibres musculaires lisses, coup\u00e9es longitudinalement ou transversalement. Elles ne pr\u00e9sentent pas d’orientation particuli\u00e8re. <\/p>\n

  <\/p>\n

Les unit\u00e9s peu color\u00e9es et vacuolis\u00e9es contiennent de m\u00eame parfois une structure ovale et ponctu\u00e9e, correspondant \u00e0 un noyau.
\nCe sont des cellules de formes variables, mais relativement volumineuses principalement en raison d’un cytoplasme abondant. Cela sugg\u00e8re qu’il s’agit de cellules s\u00e9cr\u00e9trices muqueuses.<\/p>\n

  <\/p>\n

L’organe ayant servi \u00e0 confectionner la coupe a une dimension importante et est form\u00e9 principalement de fibres musculaires lisses d’orientations diverses associ\u00e9es \u00e0 des cellules glandulaires pour la plupart muqueuses.
\nIl peut s’agir d’un organe du tube <\/a>digestif<\/a>, dont la coupe concerne la paroi.<\/p>\n

En l’occurrence la coupe a \u00e9t\u00e9 r\u00e9alis\u00e9e dans le pharynx du Lombric, Ann\u00e9lide oligoch\u00e8te se nourrissant des particules alimentaires contenues dans le sol qu’il ing\u00e8re.
\nL’organisation g\u00e9n\u00e9rale de cette paroi est donn\u00e9e dans l’article de la semaine 27-2018<\/a> de Codex virtualis et le d\u00e9tail de l’\u00e9pith\u00e9lium<\/a> dans l’article de la semaine 28-2018<\/a>.
\nIl contribue \u00e0 l’ingestion et au malaxage de la nourriture, tout comme \u00e0 son impr\u00e9gnation de mucus et fait progresser le bol alimentaire vers la r\u00e9gion post\u00e9rieure du tube digestif.<\/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

• <\/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>\n

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

Une citation \u00ab\u00a0On ne peut comprendre la vie qu’en regardant en arri\u00e8re\u00a0; on ne peut la vivre qu’en regardant en avant.\u00a0\u00bb S. Kierkegaard   Une image   Voir l’image de plus grande taille   Voir l’image l\u00e9gend\u00e9e   L’image de la semaine 29-2018 r\u00e9sulte de l’observation d’une coupe histologique \u00e0 l’objectif x40 du microscope photonique. […]<\/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-11181","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