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(==Gastrointestinal villi and crypts cartoon== The entire intestinal mucosa forms intestinal villi (about one mm long), which increase the surface area by a factor of ~ ten. The surface of the villi is formed by a simple columnar epithelium. Each absorpti) |
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==Gastrointestinal villi and crypts cartoon== | ==Gastrointestinal villi and crypts cartoon== | ||
===Villi=== | |||
* intestinal mucosa forms intestinal villi about 1 mm long. | |||
* increase the surface area by about ten-fold. | |||
* villi surface is a simple columnar epithelium. | |||
* each absorptive cell or enterocyte of the epithelium forms numerous microvilli (1 µm long and about 0.1 µm wide). | |||
** microvilli increase the surface area again by a factor of about twenty-fold. | |||
===Crypys=== | |||
* crypts of Lieberkühn. | |||
* lie between the intestinal villi and are openings of simple tubular glands. | |||
* extend through the lamina propria down to the muscularis mucosae. | |||
* Undifferentiated cells close to the bottom of the crypts regenerate the epithelium (epithelial cell turnover time is less than one week). | |||
* Other epithelial cells in the crypts correspond largely to those in the epithelium of the intestinal villi. | |||
* Paneth cells | |||
** are located at the bottom of the crypts | |||
** release a number of antibacterial substances, including lysozyme. | |||
** thought to be involved in the control of infections. | |||
{{Blue Histology}} | |||
[[Category:Gastrointestinal tract]] [[Category:Cartoon]] | [[Category:Gastrointestinal tract]] [[Category:Cartoon]] |
Revision as of 13:53, 18 February 2013
Gastrointestinal villi and crypts cartoon
Villi
- intestinal mucosa forms intestinal villi about 1 mm long.
- increase the surface area by about ten-fold.
- villi surface is a simple columnar epithelium.
- each absorptive cell or enterocyte of the epithelium forms numerous microvilli (1 µm long and about 0.1 µm wide).
- microvilli increase the surface area again by a factor of about twenty-fold.
Crypys
- crypts of Lieberkühn.
- lie between the intestinal villi and are openings of simple tubular glands.
- extend through the lamina propria down to the muscularis mucosae.
- Undifferentiated cells close to the bottom of the crypts regenerate the epithelium (epithelial cell turnover time is less than one week).
- Other epithelial cells in the crypts correspond largely to those in the epithelium of the intestinal villi.
- Paneth cells
- are located at the bottom of the crypts
- release a number of antibacterial substances, including lysozyme.
- thought to be involved in the control of infections.
Links: Histology | Histology Stains | Blue Histology images copyright Lutz Slomianka 1998-2009. The literary and artistic works on the original Blue Histology website may be reproduced, adapted, published and distributed for non-commercial purposes. See also the page Histology Stains.
Cite this page: Hill, M.A. (2024, June 19) Embryology Gastrointestinal villi and crypts cartoon.jpg. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/File:Gastrointestinal_villi_and_crypts_cartoon.jpg
- © Dr Mark Hill 2024, UNSW Embryology ISBN: 978 0 7334 2609 4 - UNSW CRICOS Provider Code No. 00098G
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