Performing both an exocrine and intrasecretory function, the pancreas is one of the most important organs of the human digestive system.
The base of the capsule of the pancreas, or otherwise - the stroma, is represented by fibers of loose connective tissue, has a shiny surface. Elements that carry the main functional load and are called the parenchyma organ are divided into exocrine and endocrine parts.
The histology of the pancreas, namely its exocrine fraction, is formed by:
- Acinus producing enzymes such as chymotrypsin, amylase, lipase, and others.
- With the output ducts dividing into: intercalary( represented by the epithelium flat), interacinous( represented by epithelium cubic) and interlobular(represented by epithelium prismatic).The cells of these ducts produce bicarbonates responsible for the alkaline component of pancreatic juice.
The histology of the islets of Langerhans consists of a large number of cells, and forms the endocrine part of the organ. They are responsible for the production of insulin, glucagon, somatostatin, pancreatic and vasoactive intestinal polypeptide. There are no terminal ducts in the endocrine part.
The organ receives its development from the mesenchyme and endoderm. The first embryo is formed already on the 20th day of intrauterine growth of the embryo. This is the histology of the pancreas.
Pancreatic biology
Pancreatic biology is represented by:
- The body is triangular in shape, having three surfaces and, correspondingly, three edges. On the front surface of the body is located glandal tubercle, on the back - furrows with splenic vessels.
- A head that fits snugly against the duodenum and is separated from the body by a furrow that has a portal vein inside.
- Tail, having an oblong shape, directed upwards and to the left.
The appearance of iron somewhat resembles a tadpole's frog. The size of the adult body varies considerably, so the length can be in the range between 14 and 22 cm, width between 3 and 9 cm, but the thickness of all people is approximately the same and averages 2 cm. Weight is 70-110 g.
The organ is located in the peritoneum, behind the stomach, closely adjacent to the duodenum. The color of the pancreas is gray-pink. Biology of the blood supply to the tail and body - their blood supply occurs at the expense of the splenic artery, and the head through the pancreatoduodenal arteries that extend from the mesenteric and hepatic arteries.