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بافتشناسی لولة گوارش و کبد در ماهی حوض (Carassius auratus) | ||
| شیلات | ||
| دوره 77، شماره 4، آذر 1403، صفحه 313-323 اصل مقاله (1.37 M) | ||
| نوع مقاله: مقاله پژوهشی | ||
| شناسه دیجیتال (DOI): 10.22059/jfisheries.2024.378706.1434 | ||
| نویسندگان | ||
| وحیده السادات میرجلیلی؛ سید محمدهادی علوی* | ||
| گروه علوم جانوری، دانشکدة زیست‌شناسی، دانشکدگان علوم، دانشگاه تهران، تهران، ایران. | ||
| چکیده | ||
| دستگاه گوارش در ماهی‌ها شامل لولة گوارش و اندام های ضمیمه ای اند و دریافت، هضم غذا و جذب مواد مغذی به بدن را تنظیم می کنند. هدف از پژوهش حاضر، بررسی بافتشناسی مقایسهای در طول لولة گوارش و اندام کبد در ماهی حوض (Carassius auratus) بود. با کاربرد مدل رگرسیون خطی رابطة مثبت بین وزن دستگاه‌گوارش با وزن بدن شمخص شد (006/0P=، 620/0 r=، 18n= ). لولة گوارش از خارج به داخل شامل بافت همبند سروزی، لایة عضلانی و لایة زیرمخاط و مخاط است. اپیتلیوم لایة مخاطی پرزهای روده و راستروده شامل سلولهای انتروسیت ها و سلولهای جامی اند و در رأس پرز، سلولهای انتروسیت کوتاهتر و سلول های جامی مشاهده نمی شود. بررسی ریخت‌شناسی پرزها نشان داد که طول پرزها در راستروده بیشتر از بخش های ابتدایی، میانی و انتهایی روده است (0/001>P). در روده، طول پرز در بخش میانی نسبت به بخشهای ابتدایی و انتهایی کوتاهتر بود (001/0>P). عرض و فاصلة بین پرزها در طول روده از بخش ابتدایی به انتهایی به‌طور معنیداری افزایش نشان داد، سپس در راست روده کاهش یافت (0/001>P). ضخامت لایة ماهیچهای در بخش ابتدایی و انتهایی روده نسبت به بخش میانی بیشتر بود (0/001>P) و در رکتوم در مقایسه با بخش های مختلف روده بیشتر بود (0/001>P). کبد از سلولهای کبدی به شکل پراکنده یا شعاعی تشکیل شد و مجاری صفراوی به‌همراه سینوزوئیدها و سیاهرگ‌ها در پارانشیم کبد قابل مشاهده بود. مطالعة حاضر برای اولین بار ویژگی های ریختی پرزها را در طول لولة گوارش در ماهی حوض نشان داد که حاکی از سازگاری بافتی با عملکرد موضعی برای بهینهسازی هضم و جذب مواد مغذی در این ماهی است. | ||
| کلیدواژه‌ها | ||
| سلولهای پوششی (انتروسیت)؛ پرز؛ سلول جامی؛ سلولهای کبدی؛ ماهی حوض | ||
| عنوان مقاله [English] | ||
| Histology of digestive tract and liver in goldfish (Carassius auratus) | ||
| نویسندگان [English] | ||
| Vahidesadat Mirjalili؛ Sayyed Mohammad Hadi Alavi | ||
| Department of Animal Biology, School of Biology, College of Science, University of Tehran, Tehran, Iran. | ||
| چکیده [English] | ||
| The fish digestive system consists of the digestive tract and accessory glands that regulate food intake and digestion and absorption of nutrients. The aim of the present study was to investigate histological features of digestive tract and liver in goldfish (Carassius auratus). A linear regression model showed a positive relationship between digestive mass and body mass (r= 0.620, n= 16, P=0.006). The digestive tract, from outer to inner, consists of serosa, muscular, submucosal, and mucosal layers. The epithelium of the mucosal folds contained enterocytes and goblet cells in both intestine and rectum. The enterocytes were shorter in length at the apices of the mucosal folds, which were free of goblet cells. Morphometric analysis of histological indices showed longer mucosal folds in the rectum than in intestine portions (P<0.001). In the intestine, the length of mucosa folds in the middle segment was shorter than those of anterior and posterior segments (P<0.001). The basal width of mucosal folds and the distance between two subsequent folds were significantly increased from the anterior to the posterior segments of the intestine, and then decreased in the rectum (P<0.001). The thickness of the muscular layer in the anterior and posterior segments of the intestine was higher than the middle segment (P<0.001), and it was greater in the rectum compared to the intestinal segments (P<0.001). The liver consists of hepatocytes arranged in a diffuse or radial organization, with bile ducts, sinusoids, and veins in the liver parenchyma. This study, for the first time, reveals the morphological features of mucosal folds along the digestive tract in goldfish, suggesting that histological adaptation with spatial function optimizes food digestion and nutrient absorption. | ||
| کلیدواژه‌ها [English] | ||
| Epithelium cells, Goblet cells, Goldfish, Hepatocytes, Mucosal folds | ||
| مراجع | ||
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