{"id":81182,"date":"2018-05-16T10:11:19","date_gmt":"2018-05-16T10:11:19","guid":{"rendered":"http:\/\/humanitasnet-new.local\/enciclopedia\/intestinul-subtire\/"},"modified":"2018-05-16T10:11:19","modified_gmt":"2018-05-16T10:11:19","slug":"intestinul-subtire","status":"publish","type":"enciclopedia","link":"https:\/\/humanitas-net.humweb.webiz.team\/ro\/wiki\/intestinul-subtire\/","title":{"rendered":"Intestinul sub\u021bire"},"content":{"rendered":"<h2 id=\"ce-este-intestinul-subtire\">Ce este intestinul sub\u021bire?<\/h2>\n<p>Intestinul sub\u021bire este cea mai lung\u0103 parte a sistemului digestiv, av\u00e2nd aproximativ 7 metri lungime. Este un tub muscular, \u00eemp\u0103r\u021bit \u00een trei por\u021biuni: duodenul, jejunul \u0219i ileonul. Duodenul sf\u0103r\u00e2m\u0103 hrana, \u00een timp ce jejunul \u0219i ileonul absorb substan\u021bele nutritive \u0219i le trimit \u00een s\u00e2nge.<\/p>\n<p>&nbsp;<\/p>\n<p>Intestinul sub\u021bire se continu\u0103 cu intestinul gros, prin supapa ileocecal\u0103. Este parte a tractului gastro-intestinal dintre stomac \u0219i intestinul gros, unde are loc procesul de digestie \u0219i absorb\u021bia alimentelor. Membrana din mucoas\u0103 care acoper\u0103 pere\u021bii interiori este acoperit\u0103 de vili intestinali (responsabili pentru absorb\u021bia nutrien\u021bilor introdu\u0219i prin alimente) \u0219i de pliuri circulare, a c\u0103ror prezen\u021b\u0103 serve\u0219te la extinderea suprafe\u021bei intestinului sub\u021bire, pentru a \u00eendeplini mai bine sarcinile legate de digestie \u0219i absorb\u021bia nutrien\u021bilor.<\/p>\n<p>&nbsp;<\/p>\n<p>Duodenul este por\u021biunea ini\u021bial\u0103 a intestinului. Fiind \u00een form\u0103 de C \u0219i av\u00e2nd o lungime de aproximativ 25 cm, se extinde de la por\u021biunea final\u0103 a stomacului p\u00e2n\u0103 la flexura duodenojejunal\u0103, care este grani\u021ba dintre duoden \u0219i jejun. \u00cenveli\u0219ul din mucoas\u0103 al intestinului sub\u021bire implic\u0103 secretina (un hormon care stimuleaz\u0103 secre\u021bia sucurilor digestive) \u0219i serotonina (un neurotransmi\u021b\u0103tor \u00een sistemul nervos central), precum \u0219i absorb\u021bia de fier \u0219i calciu.<\/p>\n<p>&nbsp;<\/p>\n<p>Jejunul reprezint\u0103 a doua por\u021biune a intestinului. Acesta este precedat de ileon, de care se deosebe\u0219te prin c\u00e2teva caracteristici (pere\u021bi mai gro\u0219i, vili intestinali \u0219i falduri circulare mai multe). Ileonul se une\u0219te cu cecumul intestinului gros la jonc\u021biunea ileocecal\u0103.<\/p>\n<p>&nbsp;<\/p>\n<p>Exist\u0103 multe modalit\u0103\u021bi prin care intestinul sub\u021bire poate deveni bolnav sau cu probleme. C\u00e2teva astfel de probleme cu intestinul sub\u021bire pot include boala Crohn, boala celiac\u0103, infec\u021bii, sindromul de colon iritabil, s\u00e2ngerarea, ulcerele, cancerul intestinal \u0219i obstruc\u021bia intestinal\u0103. Consultul medical este esen\u021bial\u0103 pentru a verifica cauza tulbur\u0103rii, pentru a determina cea mai potrivit\u0103 form\u0103 de tratament \u0219i a preveni agravarea simptomelor. O diet\u0103 s\u0103n\u0103toas\u0103, echilibrat\u0103, precum \u0219i un stimulant intestinal sunt adesea recomandate ca fiind una dintre cele mai bune modalit\u0103\u021bi de a men\u021bine s\u0103n\u0103tatea intestinului sub\u021bire \u0219i de a preveni apari\u021bia complica\u021biilor.<\/p>\n<p>&nbsp;<\/p>\n<h2 id=\"ce-functie-indeplineste-intestinul-subtire\">Ce func\u021bie \u00eendepline\u0219te intestinul sub\u021bire?<\/h2>\n<p>\u00cen general, intestinul sub\u021bire finalizeaz\u0103 procesul de digestie care \u00eencepe \u00een gur\u0103 \u0219i este continuat \u00een stomac. Func\u021bia sa principal\u0103 este de a completa digestia, prin ac\u021biunea sucurilor enterice, produs\u0103 prin secre\u021bia glandelor Lieberk\u00fchn \u0219i absorbind nutrien\u021bii din alimente. Pentru a \u00eendeplini aceast\u0103 func\u021bie, suprafa\u021ba complex\u0103 a membranei mucoase este extins\u0103 de prezen\u021ba vililor intestinali \u0219i a pliurilor circulare.<\/p>\n<p>&nbsp;<\/p>\n<p>Intestinul sub\u021bire este locul unde are loc 90% din digestia \u0219i absorb\u021bia alimentelor, \u00een timp ce celelalte 10% au loc \u00een stomac \u0219i intestin gros. Digestia implic\u0103 adesea dou\u0103 p\u0103r\u021bi: prima este digestia mecanic\u0103, iar a doua este digestia chimic\u0103. Digestia mecanic\u0103 implic\u0103 mestecarea, sf\u0103r\u00e2marea \u0219i amestecarea alimentelor \u00een gur\u0103, pentru a fi transferate c\u0103tre stomac. Pe de alt\u0103 parte, digestia chimic\u0103 utilizeaz\u0103 enzime, acizi biliari \u0219i alte substan\u021be, pentru a descompune materialul alimentar \u0219i apoi a-l absorbi \u00een \u021besuturile organismului.<\/p>\n","protected":false},"featured_media":0,"parent":0,"template":"","Example":[1792],"class_list":["post-81182","enciclopedia","type-enciclopedia","status-publish","hentry","enciclopedia_category-anatomie"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.3 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Intestinul sub\u021bire - Humanitas.net<\/title>\n<meta name=\"robots\" content=\"noindex, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<meta property=\"og:locale\" content=\"ro_RO\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Intestinul sub\u021bire - Humanitas.net\" \/>\n<meta property=\"og:description\" content=\"Ce este intestinul sub\u021bire? 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Intestinul sub\u021bire este cea mai lung\u0103 parte a sistemului digestiv, av\u00e2nd aproximativ 7 metri lungime. Este un tub muscular, \u00eemp\u0103r\u021bit \u00een trei por\u021biuni: duodenul, jejunul \u0219i ileonul. 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