![\"Quel](\"\/documents\/images\/histologie_articles\/cellule_libre\/lombric_coelomocyte_03-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 37-2018 r\u00e9sulte de l’observation d’une coupe histologique \u00e0 l’objectif x100 du microscope photonique.<\/p>\n Elle appara\u00eet form\u00e9e d’unit\u00e9s disjointes de dimensions, de formes, de textures et de colorations diverses. <\/p>\n Plusieurs types de cellules sont distingu\u00e9s :<\/p>\n • <\/span>certaines sont relativement volumineuses et de forme ovale, contiennent un noyau de grande taille et excentr\u00e9, ainsi qu’un vaste espace clair correspondant \u00e0 une vacuole ;<\/p>\n • <\/span>d’autres poss\u00e8dent de longues expansions appel\u00e9es pseudopodes et un noyau allong\u00e9 ;<\/p>\n • <\/span>plusieurs sont de forme ovale et munies d’un volumineux noyau oblong, pr\u00e9sentent une limite peu nette finement ondul\u00e9e ;<\/p>\n • <\/span>quelques-unes sont de grande taille, de forme \u00e9toil\u00e9e, et poss\u00e8dent un noyau clair ainsi qu’un cytoplasme<\/a> granuleux. <\/p>\n <\/p>\n Dispers\u00e9es, les cellules ainsi d\u00e9crites baignent dans un liquide et ont la propri\u00e9t\u00e9 de circuler.<\/p>\n Leurs caract\u00e9ristiques permettent de les identifier comme des cellules du liquide c\u0153lomique<\/a> des Ann\u00e9lides<\/a>, et plus particuli\u00e8rement du Lombric.<\/p>\n Il s’agit de c\u0153lomocytes appartenant \u00e0 la cat\u00e9gorie des leucocytes, dont le cytoplasme est finement granuleux. En relation avec les propri\u00e9t\u00e9s tinctoriales de leurs granulations cytoplasmiques, ils sont respectivement qualifi\u00e9s :<\/p>\n • <\/span>de basophiles (deux stades de leur \u00e9volution sont observ\u00e9s) ;<\/p>\n • <\/span>d’acidophiles ;<\/p>\n • <\/span>de neutrophiles.<\/p>\n <\/p>\n Les leucocytes du liquide c\u0153lomique pratiquent la phagocytose, ingestion consistant \u00e0 englober un volume de milieu, des particules voire des cellules au sein d’une v\u00e9sicule produite par d\u00e9formation de la membrane plasmique. <\/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\u00a0La vie, c’est ce qui arrive alors que vous avez d’autres projets.\u00a0\u00bb T. Pratchett Une image Voir l’image de plus grande taille Voir l’image l\u00e9gend\u00e9e L’image de la semaine 37-2018 r\u00e9sulte de l’observation d’une coupe histologique \u00e0 l’objectif x100 du microscope photonique. Elle appara\u00eet form\u00e9e d’unit\u00e9s disjointes de dimensions, […]<\/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-11348","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
\nContenant une structure ovale ou circulaire finement ponctu\u00e9e et entour\u00e9e d’une masse h\u00e9t\u00e9rog\u00e8ne, pr\u00e9sentant une limite externe irr\u00e9guli\u00e8re, il s’agit de <\/a>cellules<\/a> eucaryotes<\/a> animales munies d’un noyau et bord\u00e9es d’une membrane plasmique.<\/p>\n
\nIls contribuent ainsi \u00e0 l’immunit\u00e9 du Lombric, dans le c\u0153lome duquel de nombreuses bact\u00e9ries ainsi que des eucaryotes unicellulaires et de N\u00e9matozoaires sont pr\u00e9sents. <\/p>\n
\nDOI : \/10.1007\/BF00220292<\/a><\/p>\n
\nDOI : 10.1002\/jmor.1051530310<\/a><\/p>\n
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