What is the difference between rugae and plicae circulares?
What is the difference between rugae and plicae circulares?
Rugae are characteristic features of the stomach. These longitudinal folds (or ridges) enable the stomach to distend as it fills with food. Plicae circulares are circular folds in the mucosa in the small intestine that increase the surface area for nutrient absorption.
What is plicae circulares rugae?
Structurally, the mucosa is covered in wrinkles or folds called plicae circulares—these are permanent features in the wall of the organ. They are distinct from the rugae, which are non-permanent features that allow for distention and contraction.
What is the rugae?
The rugae are folds in the stomach lining. Surface epithelial cells, specialized mucus cells of the neck, and mucus cells in the glands also secrete mucin, a high molecular weight glycoprotein.
Where are plicae circulares found?
The plicae circulares are most prominent in the distal duodenum and jejunum. Observe the layers of the wall of the jejunum . Note the absence of glands in the submucosa, which is a characteristic feature of the jejunum.
Where is rugae function?
Inside the stomach are rugae, ridges that increase the surface area of the stomach and stretch out to increase stomach volume when the stomach is full.
Are plicae circulares in the submucosa?
The folds, containing a core of submucosa, are the plicae circulares (valves of Kerckring) which can be observed with your naked eye by holding the slide up to the light. The plicae circulares are most prominent in the distal duodenum and jejunum. Observe the layers of the wall of the jejunum .
What is crypts of Lieberkuhn 11?
Crypts of Lieberkuhn are also called succus entericus. They are the clear to pale yellow watery secretions from the glands lining the walls of the small intestine. Additional information. – The crypts of Lieberkuhn are the tubular glands that lie between the finger-like projections of the small intestine called villi.
What are the enterocytes?
The enterocyte is the most abundant epithelial cell lineage in both the small and the large intestines. Enterocyte membranes, as well as the tight junctions that form between the cells, present a significant physical barrier to microbial invasion.