The Endocrine System

  • S. H. Aharinejad
  • A. Lametschwandtner


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.


Exocrine Pancreas Zona Glomerulosa Interlobular Artery Efferent Vessel Medullary Artery 
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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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