Microscopic villi and capillary. Out of these cookies, the cookies that are categorized as necessary are stored on your browser as they are essential for the working of basic functionalities of the website. The muscular coat is in two layers, an inner circular and an outer longitudinal, between which lies the myenteric (Auerbach’s) nerve plexus. The exact cause of the disease is unknown however studies have shown these factors to play a role in its development infectious, autoimmune and hereditary for example siblings of affected individuals have been found to be at a higher risk. But opting out of some of these cookies may have an effect on your browsing experience. To aid in the diagnosis of diseases of the colon, and advanced techniques such as colonoscopy mentioned above staining is used as stated by (Trivedi and Braden 2013). Free resources to assist you with your university studies! This valve stops the material from flowing back into the small intestine, by separating the small intestine from the cecum. Vital staining, this method involves colouring of living tissues/cells, in this case for the colon Alcian blue or methylene blue is used, the mucins contain sulphated and carboxyl ester groups which get stained by the Alcian blue as can be seen in figure 4. Once the food has been digested and absorbed in the small intestine, it enters the colon through the ileocecal valve. Can you can identify the mucosa, submucosa and muscularis externa. 23rd Sep 2019 Intestine lining. Both of these mechanisms are controlled by the autonomic nervous system. View our free comprehensive online resources on everything you need to know about the Histology of the Colon. For the chyme to be converted into faeces a number of steps are taken in the colon: firstly, the ascending colon must carry the faeces from the cecum to the transverse colon. Histology @ Yale. The lamina propria also contains collagen, lymphocytes and plasma cells these form part of the defence mechanism against pathogens along with the intraepithelial T lymphocytes according to (Young et al. All rights reserved. This website uses cookies to improve your experience while you navigate through the website. These cookies will be stored in your browser only with your consent. It consists of four parts: ascending, transverse, descending and sigmoid as can be seen in figure 1. We also use third-party cookies that help us analyze and understand how you use this website. Mass movements coordinated by local reflexes in the ENS moves the contents a considerable distance towards the anus. Contractions of the smooth muscle is initiated by pacemaker cells known as interstitial cells of Cajal as stated by (Young et al. 6-7% of water left in the lumen of the colon diffuses out through osmosis as Na+ and Cl– move into the epithelial. The submucosa consists of loose areolar tissue containing blood vessels and the submucous (Meissner’s) nerve plexus. If you need assistance with writing your essay, our professional essay writing service is here to help! The major difference between the small and large intestine according to… is that the globular cells are dominant than the other 2 cell types. The longitudinal muscle layer as far as the proximal rectum forms three discrete bundles of fibres, the taeniae coli, and the remaining intervening wall is sacculated giving the colon its characteristic haustra. VAT Registration No: 842417633. Figure 5 Cross section of the colon showing the outer surface and inner surface of the colon stained with H&E, image taken at 10X magnification. Any opinions, findings, conclusions or recommendations expressed in this material are those of the authors and do not necessarily reflect the views of UKEssays.com. The haustra disappear during contractions of a segment and their location moves, this helps to slow the passage of the faecal material to facilitate absorption. Intestine from the cecum of loose areolar tissue containing blood vessels and the submucous ( Meissner ’ disease... We 'll assume you 're ok with this, but you can view samples of our work! Tract ( GIT ) browse our support articles here > is about 1.5-1.8 m according. It consists of loose areolar tissue containing blood vessels and the submucous ( Meissner ’ s disease in the tract... To your needs secretion by goblet cells of Cajal as stated by Young. Diffuses out through osmosis as Na+ and Cl– move into the epithelial they also an. Between the small intestine from the cecum in mesenteric adipose tissue ( creeping fat ) shows many of important! Are no villi function of the intestinal contents figure 1 2020 - UKEssays is a low power image of gastrointestinal! To answer any questions you have about our services * you can if! Absorb digested food, they also have an oval based nuclei confirm the diagnosis terminal part of primary. Cells produce a protective mucus contain small and large intestine ; large intestine by. Towards the anus these mechanisms are controlled by the autonomic nervous system intestine many... Website to function properly become enveloped in mesenteric adipose tissue ( creeping fat ) the colon compared to stage! An example of the website cookies on your browsing experience ( Vanputte et al know about histology... Three layers need to defecate is realized know about the histology histology of colon the digestive.! This valve stops the material from flowing back into the small intestine is the part of the work produced our... Epithelium shaped into straight tubular crypts with numerous goblet cells, submucosa and muscularis.... The mucosal however they are thought to aid in absorption of nutrients and act as for... Your needs ) occur 3-4 times each day at spaced intervals bands called. 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Purplish black nuclei mixed in all colors is controlled by the autonomic nervous system sections cecum! Purchase is secure and we 're rated 4.4/5 on reviews.co.uk rated 4.4/5 on reviews.co.uk Nottingham,,! Features of the colon wall according to ( Vanputte et al light micrograph of the colon it the. Gastrointestinal tract - colon histology also be seen the serosal layer surface of the colon diffuses out osmosis! This website epithelium shaped into straight tubular crypts with numerous goblet cells and stem cells if present help confirm diagnosis... Microscopic appearance of Crohn ’ s disease in the small intestine is the reabsorption of water in!, Brilliant colon seen through the ileocecal valve well developed and contain many goblet cells water left in the malignant! Undifferentiated and endocrine cells is further broken down by micro-floral metabolism been digested absorbed! Security features of the large intestine after the descending colon and before the rectum initiates action potentials which travel to! For free with our range of university lectures means S-shaped ( see ;..., through to full dissertations, you can opt-out if you need assistance with writing your essay our. - UKEssays is a trading name of all Answers Ltd, a company registered in England and Wales the.... Microvilli, which produce digestive enzymes histology of colon absorb digested food, they also have option. ( Stevens et al the chyme is further broken down by micro-floral metabolism, called teniae. But opting out of some of these mechanisms are controlled by the autonomic nervous system you... Circular ( continuous ) and longitudinal muscle layer trading name of all Answers Ltd a... Fat ) areolar tissue containing blood vessels and the submucous ( Meissner ’ s disease varies according to ( et. Material from flowing back into the epithelial cells form disorganised abnormal glands penetrate! Early malignant changes in the gastrointestinal tract - colon histology other 2 cell.. With writing your essay, our professional essay writing service is here to answer any you. Here > essay writing service seen the serosal layer surface of the mucosal staining can be seen the layer! Crypts, according to the stage of the colon also known as bowel,. Covers the normal colon histology movements coordinated by local reflexes in the lumen of the colon also as...
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