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There are about 1 million islets distributed throughout the pancreas of a healthy adult human. While islets vary in size, the average diameter is about 0.2 mm. [5]:928 Each islet is separated from the surrounding pancreatic tissue by a thin, fibrous, connective tissue capsule which is continuous with the fibrous connective tissue that is interwoven throughout the rest of the pancreas.
The pancreas is an organ of the digestive system and endocrine system of vertebrates. In humans, it is located in the abdomen behind the stomach and functions as a gland. The pancreas is a mixed or heterocrine gland, i.e., it has both an endocrine and a digestive exocrine function. [2] 99% of the pancreas is exocrine and 1% is endocrine.
Anatomy Atlases – Microscopic Anatomy, plate 10.213 - "Pancreas" Histology image: 10406loa – Histology Learning System at Boston University - "Liver, Gall Bladder, and Pancreas: pancreas, centroacinar cells" UIUC Histology Subject 870
2007-08-09 21:46 LadyofHats 595×842 (146995 bytes) made some changes that include: making the liver smaller, and lowering the [[:en:Pancreas|pancreas]] so that the common vile duct would get a more acurate size. 2007-08-09 18:34 LadyofHats 595×842 (145846 bytes) still typo problems; 2007-08-09 18:28 LadyofHats 595×842 (129758 bytes) small fixes
The study of microscopic anatomy (or histology) can be aided by practical experience examining histological preparations (or slides) under a microscope; and in addition, medical and dental students generally also learn anatomy with practical experience of dissection and inspection of cadavers (dead human bodies).
The head, body, and tail of the pancreas: The stomach is faded out in this image to show the entire pancreas, of which the body and tail lie behind the stomach, and the neck partially behind. Axial CT image with IV contrast and added color: Cross lines towards top left surround a macrocystic adenocarcinoma of the pancreatic head.
Light microscopy of acinar cell carcinoma. Relative incidences of various pancreatic neoplasms, with acinar cell carcinoma annotated near top right. [5] Light microscopy of an acinar cell carcinoma biopsy typically shows granular appearance. [6] Immunohistochemistry is usually positive for trypsin, chymotrypsin and lipase. [6]
The pancreatic duct or duct of Wirsung (also, the major pancreatic duct due to the existence of an accessory pancreatic duct) is a duct joining the pancreas to the common bile duct. This supplies it with pancreatic juice from the exocrine pancreas, which aids in digestion.