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The Endocrine System

  • S. H. Aharinejad
  • A. Lametschwandtner

Abstract

The pancreas has physiologically two functions: hormone release and enzyme secretion. In morphological terms, this would suggest the presence of two different vascular systems. But there are species in which the pancreas is a single-function endocrine organ so that a simple vascular architecture should be expected. The scorpion fish (Myoxocephalus scorpius) for instance, has only endocrine cells [1, 2] in its principal islets (Brockmann bodies; [3, 4]). The scorpion fish possesses two endocrine islets, juxtasplenic and juxtapyloric. The juxtasplenic islet is supplied by the dorsal mesenteric artery and the juxtapyloric islet receives blood from a branch of the mesenteric artery. The juxtasplenic islet was found to be strawberry-like in shape and to have dimensions of 2 × 2 × 2 mm. The mesenteric artery ramifies around the circumference of the organ and displays a corkscrew-like course after its division, penetrating the capsule and breaking up into small arterioles and capillaries. These are arranged in a radial lamellar fashion around the B and the D-cells in the center of the islet and subsequently join sinuses, which finally open into efferent vessels.

Keywords

Exocrine Pancreas Zona Glomerulosa Interlobular Artery Efferent Vessel Medullary Artery 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag/Wien 1992

Authors and Affiliations

  • S. H. Aharinejad
    • 1
  • A. Lametschwandtner
    • 2
  1. 1.First Department of AnatomyUniversity of ViennaViennaAustria
  2. 2.Department of Experimental ZoologyUniversity of SalzburgSalzburgAustria

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