What is the histology of the stomach?

What is the histology of the stomach?

The stomach wall consists of 4 layers of tissue. From deep (external) to superficial (internal) these are the serosa, muscularis externa, submucosa and mucosa. Although the stomach is anatomically divided into four regions, histologically we identify only three; cardia, fundus and pylorus.

What are the 3 regions of the stomach?

The stomach has three anatomical regions:

• cardiac, which contains mucous secreting glands (called cardiac glands) and is closest to the oesophagus.
• fundus, the body or largest part of the stomach which contain the gastric (fundic) glands.
• pyloric, which secretes two types of mucus, and the hormone gastrin.

What is the main region of the stomach?

There are four main regions in the stomach: the cardia, fundus, body, and pylorus (Figure 23.4. 1). The cardia (or cardiac region) is the point where the esophagus connects to the stomach and through which food passes into the stomach.

What are the four regions of stomach?

The stomach is a ‘j’-shaped organ, with two openings- the oesophageal and the duodenal- and four regions- the cardia, fundus, body and pylorus.

What is the function of each region of the stomach?

Each region performs different functions; the fundus collects digestive gases, the body secretes pepsinogen and hydrochloric acid, and the pylorus is responsible for mucus, gastrin and pepsinogen secretion.

What is the pyloric region of the stomach?

pylorus
The pylorus is the furthest part of the stomach that connects to the duodenum. It is divided into two parts, the antrum, which connects to the body of the stomach, and the pyloric canal, which connects to the duodenum.

What is the fundic region of the stomach?

Fundic glands are simple, branched tubular glands that extend from the bottom of the gastric pits to the muscularis mucosae; the more distinctive cells are parietal cells.

In which region of the stomach does most digestive activity occur?

The majority of chemical digestion occurs in the small intestine. Digested chyme from the stomach passes through the pylorus and into the duodenum. Here, chyme will mix with secretions from both the pancreas and the duodenum.

What region is the terminal part of the stomach quizlet?

The terminal end of the stomach is the pylorus.

What are the four different types of cells found in the stomach wall and what does each produce?

Four major types of secretory epithelial cells cover the surface of the stomach and extend down into gastric pits and glands:

• Mucous cells: secrete an alkaline mucus that protects the epithelium against shear stress and acid.
• Parietal cells: secrete hydrochloric acid.
• Chief cells: secrete pepsin, a proteolytic enzyme.

What are the 3 histological regions of the stomach?

But the stomach is only divided into 3 histological regions: the cardia, fundus, and pylorus. That’s because the fundus and body are histologically identical, so both regions are called the fundus when referring to their histology.

Which is part of the stomach holds the stomach in place?

The stomach is held in place by the lesser omentum, which extends from the liver to the lesser curvature, and the greater omentum, which runs from the greater curvature to the posterior abdominal wall.

Which is the most distal region of the stomach?

The fundus is the largest region histologically, since it also includes the body of the stomach as well. This region of the stomach has fundic or gastric glands that secrete digestive enzymes such as pepsin, and a protective layer of mucus. The pylorus is the most distal region of the stomach before reaching the pyloric sphincter.

What do the four layers of the stomach stand for?

You can easily remember the four layers of the stomach wall using the mnemonic ‘ M.S.M.S ‘. It stands for: M ucosa, S ubmucosa, M uscularis externa & S erosa. Although the stomach is anatomically divided into four regions, histologically we identify only three; cardia, fundus and pylorus.