![\"Quel](\"\/documents\/images\/histologie_articles\/cellule_libre\/lombric_coelomocyte_04-WEB.jpg\")
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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 38-2018 est issue de l’observation d’une coupe histologique \u00e0 l’objectif x100 du microscope photonique.<\/p>\n Elle comporte de multiples structures isol\u00e9es, de formes, de dimensions, de couleurs et de textures variables. <\/p>\n Les caract\u00e9ristiques diverses des cellules de la pr\u00e9paration permettent d’en distinguer plusieurs types :<\/p>\n • <\/span>certaines sont relativement volumineuses et pr\u00e9sentent de fines expansions p\u00e9riph\u00e9riques ondul\u00e9es correspondant \u00e0 des pseudopodes, ainsi qu’un noyau ovale l\u00e9g\u00e8rement excentr\u00e9 ;<\/p>\n • <\/span>d’autres, \u00e9galement de dimension importante, sont de forme plus r\u00e9guli\u00e8re et contiennent un cytoplasme finement granuleux ainsi qu’un espace semblant vide, repr\u00e9sentant une vacuole, leur noyau est de m\u00eame ovale et l\u00e9g\u00e8rement excentr\u00e9 ;<\/p>\n • <\/span>certaines sont peu volumineuses, de forme circulaire, et contiennent un noyau central ovale entour\u00e9 d’un cytoplasme peu abondant et finement granuleux ;<\/p>\n • <\/span>d’autres, plus volumineuses et circulaires, comportent un noyau ovale excentr\u00e9 et un cytoplasme riche en granules de dimension importantes.<\/p>\n <\/p>\n \u00c0 l’instar des cellules d\u00e9crites dans l’article de la semaine 37-2018<\/a> de Codex virtualis, il s’agit de cellules du liquide c\u0153lomique<\/a> des Ann\u00e9lides<\/a>, en l’occurrence du Lombric. Elles sont \u00e9galement appel\u00e9es \u00e9l\u00e9ments figur\u00e9s, ou plus pr\u00e9cis\u00e9ment c\u0153lomocytes en relation avec le compartiment liquidien qu’elles occupent.<\/p>\n Les deux premi\u00e8res cat\u00e9gories correspondent \u00e0 des leucocytes basophiles alors que les deux suivantes sont des leucocytes acidophiles. Au sein d’une m\u00eame cat\u00e9gorie, la diversit\u00e9 des aspects des cellules est li\u00e9e au stade atteint dans leur \u00e9volution.<\/p>\n Les leucocytes sont des c\u0153lomocytes impliqu\u00e9s dans la d\u00e9fense de l’organisme, et sont les supports de l’immunit\u00e9 de l’animal.<\/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 • <\/span>Linthicum D. S., Stein E. A., Marks D. H. and Cooper E. L., 1977 – Electron-microscopic observations of normal coelomocytes from the earthworm, Lumbricus terrestris.<\/a> Cell and Tissue Research, 185, 3 : 315-330 (adresse : https:\/\/link.springer.com\/article\/10.1007\/BF00220292) • <\/span>Stein E., Avtalion R.R. and Cooper E.L., 1977 – The coelomocytes of the earthworm Lumbricus terrestris : morphology and phagocytic properties.<\/a> Journal of morphology, 153 : 467-477 (adresse : https:\/\/onlinelibrary.wiley.com\/doi\/abs\/10.1002\/jmor.1051530310) <\/p>\n Une citation \u00ab\u00a0Le courage cro\u00eet en osant et la peur en h\u00e9sitant.\u00a0\u00bb Proverbe latin Une image Voir l’image de plus grande taille Voir l’image l\u00e9gend\u00e9e L’image de la semaine 38-2018 est issue de l’observation d’une coupe histologique \u00e0 l’objectif x100 du microscope photonique. Elle comporte de multiples structures isol\u00e9es, de formes, […]<\/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":""},"categories":[1],"tags":[47,14,23,22],"class_list":["post-11352","post","type-post","status-publish","format-standard","hentry","category-a-la-une","tag-annelide","tag-histologie","tag-observation","tag-physiologie"],"aioseo_notices":[],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/codexvirtualis.fr\/codex\/wp-json\/wp\/v2\/posts\/11352","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/codexvirtualis.fr\/codex\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/codexvirtualis.fr\/codex\/wp-json\/wp\/v2\/types\/post"}],"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=11352"}],"version-history":[{"count":11,"href":"https:\/\/codexvirtualis.fr\/codex\/wp-json\/wp\/v2\/posts\/11352\/revisions"}],"predecessor-version":[{"id":11378,"href":"https:\/\/codexvirtualis.fr\/codex\/wp-json\/wp\/v2\/posts\/11352\/revisions\/11378"}],"wp:attachment":[{"href":"https:\/\/codexvirtualis.fr\/codex\/wp-json\/wp\/v2\/media?parent=11352"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/codexvirtualis.fr\/codex\/wp-json\/wp\/v2\/categories?post=11352"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/codexvirtualis.fr\/codex\/wp-json\/wp\/v2\/tags?post=11352"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
\nLeur bordure externe entoure un contenu lisse ou granuleux, intens\u00e9ment ou faiblement color\u00e9, dans lequel une unit\u00e9 ovale ou circulaire, clairement d\u00e9limit\u00e9e et finement ponctu\u00e9e, est pr\u00e9sente.
\nUne telle organisation est caract\u00e9ristique des <\/a>cellules<\/a> animales : la limite externe correspond \u00e0 une membrane plasmique, le contenu au cytoplasme<\/a> et l’unit\u00e9 interne au noyau.
\nEn l’occurrence, elles baignent dans un liquide corporel.<\/p>\n
\nDOI : \/10.1007\/BF00220292<\/a><\/p>\n
\nDOI : 10.1002\/jmor.1051530310<\/a><\/p>\n
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