pack Flashcards
(18 cards)
What is the main function of the epithelium of the large intestine?
Water and electrolyte reabsorbtion
What is a main distingushing factor in the mucosa of the large intestine?
It contains long glands (Crypts of lieberkuhn).
These crypts extend from the epithelium all the way till the muscularis mucosae
Are plica circularis present in the large intestine?
No they are not present
Are villi present in the large intestine?
NO, they are not
What is the epithelium of the large intestine?
Simple columnar epithelium with irregular
What type of cells are present in the mucosa of the large intestine?
Panth cells
Goblet cells
enteroendocrine
Stem cells
enterocytes
What is present in the lamina propria?
CT stroma
GALT that is more developed than the one found in the small intestine
What is the muscularis externa composed of?
inner circular and outer longitudnal layers
Some of the outer longitudinal forms the tenia coli
Where is the myenteric (Aurbach’s) plexus found?
Between in the inner circular and outer longitudnal layers
What is the difference between the muscularis externa of the appendix and large intestine?
The appendix has no tenia coli and the longitudinal layer continuos around it
What epithelium covers the appendix?
Simple columnar epithelium
What type of mesothelium is present in the serosa of the appendix?
Simple squamos
What feature distinguishes the upper part of the rectum from the large intestine?
Transverse folds
What are the columns of morgani?
Longitudinal folds of mucosa
What type of epithelium is found in the rectum?
Simple columnar epithelium without microvili
What type of cells are found in mucosa of the rectum?
Almost solely goblet cells
What is the epithelium of the anal canal?
Upper part: Simple columnar epithelium
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Lower Part: Above the white line Stratified squamos epithelium non keratinized
Below the white line: Stratified squamos epithelium keratinized
Where does the epithelium of the anal canal change to keratinized?
At the anus proper
