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  • 1
    Electronic Resource
    Electronic Resource
    Microangioarchitecture of the islets of Langerhans in the snakes,Naja naja, Vipera russelli, andEchis carinatus (1991)
    Springer
    Cell & tissue research 266 (1991), S. 83-88 
    Details
    ISSN: 1432-0878
    Keywords: Islets of Langerhans ; Microangioarchitecture ; Corrosion casts ; Scanning electron microscopy ; Naja naja, Vipera russelli, Echis carinatus (Serpentes)
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Due to a decided lack in the literature of reports on the microangioarchitecture of the pancreas of snakes, an analysis was performed in three different species of two different ophidian families with the use of cast preparations and complementary scanning electron microscopy. The vascular architecture reflects the lobular substructure of the pancreas; the organ is supplied by branches of the superior mesentric artery. Coiled lobular arteries and arterioles continue into a meshwork of capillaries. Dilated capillaries of the endocrine portion of the pancreas are an integral component of this fine capillary network. A few very small capillaries establish a connection between the endocrine and the exocrine pancreas. The other capillaries drain into venules, which ultimately join their respective veins. No interspecific differences were noted in the vascularization of the pancreas of the three ophidian species examined. The present results suggest the existence of arterio-venous anastomoses and speak against the presence of a portal system, but establish a feed-forward capillary connection from the endocrine to the exocrine component of the ophidian pancreas.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00678714
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Microvasculature of the pineal organ of the rainbow trout (Salmo gairdneri) (1987)
    Springer
    Cell & tissue research 250 (1987), S. 425-429 
    Details
    ISSN: 1432-0878
    Keywords: Pineal organ ; Angioarchitecture (capillaries,arteries, veins) ; Corrosion-cast preparation method ; Scanning electron microscopy ; Salmo gairdneri
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The angioarchitecture of the pineal organ of the rainbow trout (Salmo gairdneri) was investigated by means of the corrosion-cast preparation method and scanning electron microscopy. Two main arteries (aa. epiphyseales) supply the pineal parenchyma. They emerge from the aa. cerebri anteriores and run in the fissure between the prosencephalon and the mesencephalon. After entering the pineal stalk, the aa. epiphyseales branch off into several arterioles, most of which extend to the pineal end-vesicle where they give rise to a lobular, bilaterally symmetric capillary network. Capillaries establishing the main portion of the pineal vessels appear widened in comparison to those supplying other portions of the brain and resemble capillaries in other endocrine organs. In Salmo gairdneri, no specialized system of portal vessels appears to exist between the pineal organ and other portions of the brain.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00219087
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    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Vascular pattern in the pancreas of the cat (1982)
    Springer
    Cell & tissue research 223 (1982), S. 231-234 
    Details
    ISSN: 1432-0878
    Keywords: Pancreas (cat) ; Islet of Langerhans ; Vascularization ; Scanning electron microscopy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The pathways of microcirculation in the pancreas of the cat were investigated by scanning electron microscopy of Mercox preparations of the vascular bed. A portal system from islet to exocrine vessels as well as a direct arterial flow to the exocrine pancreas have been observed. Sphincters appear to exist in portal capillaries at the border between the endocrine and exocrine portions of the pancreas. Islets possess an independent venous drainage.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00221512
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    Paper (German National Licenses)
    Fulltext
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