5. Histology of the Small and Large Intestine Flashcards
What glands are located in the submucosa of the duodenum?
Brunner’s glands
What is the function of Brunner’s glands?
Secretion of an alkaline fluid to neutralize acidic chyme.
How many submucosal glands do we find in the jejunum?
The jejunum has no submucosal glands.
What glands can be found in the submucosa of the stomach?
There are no submucosal glands in the stomach. The gastric glands are located in the gastric mucosa.
What do we call the lymphatic structure that assists with the absorption of fat in the intestinal villi?
Lacteal
Where are paneth cells unique to?
The small intestine.
(Specifically the base of the intestinal glands in the small intestine)
Where are Brunner’s glands located histologically?
In the submucosa of the duodenum
What cells of the small intestine secrete lysozyme, alpha-defensins, and other glycoproteins for antimicrobial defense?
Paneth cells
What prevents the plicae circulares from ever laying completely flat?
The plicae circulares have a submucosal core
Histologically speaking, where are intestinal glands found?
Throughout the mucosal layer of the entire small intestine
If you’re looking at a section of small intestine, and you see no Peyer’s patches and no Brunner’s glands, what section of the small intestine are you looking at?
The Jejunum
Which part of the intestine typically has the longest villi?
The jejunum
What do we call the simple columnar cells of the large intestine?
Colonocytes
What is the primary indicator histologically of a slide coming from the colon?
A multitude of goblet cells without villi
What layer, in the colon, forms the tinea coli?
The outer longitudinal layer of the muscularis externae