Question

What is a gastric pit?

Answer 1

Hint: The layering of the stomach at rest is moved in thick and smooth folds which are known as rugae. Rugae have microscopic invaginations called gastric pits. Each One of them allows four or five gastric glands.

Complete answer:
Gastric pits are hollow depressions in the stomach which designate entrance to 3-5 tubular shaped gastric glands. They are very shallow in the pylorus in comparison to any parts of the stomach. Our stomach has millions of these pits which spot the lining area of epithelium. These gastric glands have two species, oxyntic glands and pyloric glands.
These gastric pits are covered into different numbers of cells. They are totally composed of mucous columnar cells. These cells help in all functions of the stomach. The goblet cells secrete mucus which creates a thin protective layer that surrounds the stomach. The parietal cells secrete hydrochloric acid that are accountable for producing a low pH in the stomach. The gastric acid, which is also called gastric juice, is situated in the gastric pits. Gastric juice has hydrochloric acid, pepsinogen, and mucus. The hydrochloric acid is discharged by parietal cells. The gastric chief cells discharge pepsinogen and mucous neck cells discharge mucus. The gastric pits along with the lumen discharge gastric cell secretions.

Note:
Mucosa is fully covered in gastric pits and glands. The smooth muscle layer muscularis mucosa has three layers of muscles. These layers support the breaking down of the food. The cells which produce a thick coating are being replaced in 4 to 6 days.