How can you tell the difference between pylorus histology and fundus?
How can you tell the difference between pylorus histology and fundus?
The pylorus is the narrow region that connects the stomach to the duodenum. The cardia and pylorus contain branched coiled tubular glands that secrete mucus. In contrast, the mucosa of the fundus/body contains long, branched tubular gastric glands with several cell types that secrete substances that aid in digestion.
What is the epithelium of pyloric part of stomach?
The duct is lined by columnar cells, continuous with the epithelium lining the surface of the mucous membrane of the stomach, the tubes by shorter and more cubical cell which are finely granular. The glands contain mucus cells and G cells that secrete gastrin.
What is unique about the histology of the stomach?
The lining epithelium of the stomach, and gastric pits is entirely made up of mucous columnar cells. These cells produce a thick coating of mucus, that protects the gastric mucosa from acid and enzymes in the lumen.
What is the histology of stomach?
Histologically, the entire stomach is made up of simple tubular glands and foveolae (gastric pits) and there are essentially only 2 types of mucosa: Antral (cardia, antrum and pylorus) Oxyntic (fundus and body).
How do pylorus and duodenum differ?
As nouns the difference between duodenum and pylorus is that duodenum is the first part of the small intestine, starting at the lower end of the stomach and extending to the jejunum while pylorus is (anatomy) the opening in a vertebrate, including humans, at the lower end of the stomach that opens into the duodenum.
What are the similarities and differences between parietal cells and chief cells in the wall of the stomach?
Parietal cells are the epithelial cells that secrete HCl and intrinsic factor. They are located in the gastric glands found in lining of fundus and stomach. The gastric chief cells , are cells in the stomach that release pepsinogen and chymosin.
What type of epithelium is in the stomach?
simple columnar epithelium
The mucosal lining of the stomach is simple columnar epithelium with numerous tubular gastric glands. The gastric glands open to the surface of the mucosa through tiny holes called gastric pits.
Does duodenum have serosa or adventitia?
The muscular layer of the duodenum is bounded by both tissue types. Generally, if it is a part of the digestive tract that is free to move, it is covered by serosa, and if it is relatively rigidly fixed, it is covered by adventitia.
How do you distinguish a histology slide?
Inspection: Inspect the slide using just your eyes and a good light source to first determine the shape of the prepared section. Occasionally, a specific section has a characteristic shape and is much easier to identify. e.g on the cross section of tracheal cartilage an annular preparation can be seen.
What are the regions of the stomach?
Your stomach has five distinct sections:
- The cardia is the top part of your stomach.
- The fundus is a rounded section next to the cardia.
- The body (corpus) is the largest section of your stomach.
- The antrum lies below the body.
- The pylorus is the bottom part of your stomach.
What separates the stomach from the duodenum?
The pyloric sphincter
The pyloric sphincter is a ring of smooth muscle that connects the stomach and small intestine. It opens and closes to control the passage of partially digested food and stomach juices from the pylorus to the duodenum.
What is gastric fundus symptoms?
Gnawing or burning ache or pain (indigestion) in your upper abdomen that may become either worse or better with eating
What is a pyloric polyp?
Ultrasonographic examination revealed a 1 x 2 cm pedunculated polypoid mass in the pyloric antrum. Histopathology showed this to be comprised of a pedunculated hyperplastic proliferation of gastric mucosal epithelium and submucosa, with dilatation of the glandular pits and a moderate degree of submucosal fibrosis and small amount of smooth muscle hyperplasia in the submucosa.
What is pyloric gland metaplasia?
Pyloric metaplasia first affects glands closest to the antral junction, producing antral expansion at the expense of the oxyntic mucosa. There is some debate whether the metaplastic cells are indeed metaplastic or are a novel cell lineage that develops in the stomach and other gastrointestinal sites following ulceration.
What is pyloric stenosis?
Pyloric stenosis is a thickening or narrowing of the pylorus, a muscle in the stomach. This problem happens to newborns. The full name of the condition is hypertrophic pyloric stenosis (HPS). Hypertrophy means thickening. Pyloric stenosis causes projectile vomiting and can lead to dehydration in babies.