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  • 1
    Electronic Resource
    Electronic Resource
    Fine structure of capillaries in the pecten oculi of the sparrow, Passer domesticus (1973)
    Springer
    Cell & tissue research 146 (1973), S. 281-292 
    Details
    ISSN: 1432-0878
    Keywords: Eye ; Bird ; Pecten oculi ; Capillaries ; Ultrastructure
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The pecten oculi of the sparrow consists of capillaries, pigment cells and a superficial membrane. Because of the loose structure of the first two components broad intercellular spaces occur in the pecten. The capillary wall consists of endothelial cells and a perivascular membrane. The bodies of the endothelial cells are flattened, while the plasmalemma of both their surfaces (basal and luminal) is strongly folded and forms numerous microfolds with an average thickness of 700 Å. The height of the inner microfolds is 1.4–1.8 μm, the outer microfolds measure 1.3–1.6 μm. They lie densely packed side by side and are separated by recesses of the capillary lumen ca. 500 Å wide. Due to this the surface of the endothelial cell is increased by approximately 20-fold. The adjoining endothelial cells abut or overlap with margins, and are joined by the zonulae adherentes. Pigment cells form numerous processes and microvilli. Some rest on the capillary walls, while others penetrate the superficial membrane of the pecten or fill the intercellular spaces.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00307352
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Model of skin vascularization in Rana esculenta L.: Scanning electron microscopy of microcorrosion casts (1978)
    Springer
    Cell & tissue research 191 (1978), S. 539-548 
    Details
    ISSN: 1432-0878
    Keywords: Frog skin ; Respiratory capillaries ; Capillary networks ; Microcorrosion casts ; Scanning electron microscopy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Microcorrosion casts of blood vessels in the skin of Rana esculenta L. were examined by means of scanning electron microscopy with particular reference to the subepidermal network of respiratory capillaries. Due to the fact that arteries and veins lie in the deeper layers of the stratum spongiosum of the corium, the respiratory vessels form a morphologically homogeneous network. Functionally, however, this network is subdivided into small areas with a centripetal direction of blood flow. The deep capillary net, situated at the base of the stratum compactum of the corium, is not so dense as the respiratory network and does not directly communicate with it. Alveolar glands of the skin have no effect on the distribution of capillaries in the two networks.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00219816
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    On the fine structure of the gas gland in some fishes (1969)
    Springer
    Cell & tissue research 102 (1969), S. 333-356 
    Details
    ISSN: 1432-0878
    Keywords: Gas gland ; Fishes
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The fine structure of the gas gland cells in Perca and Acerina was studied with the light- and electron microscope. In some of the animals the gas glands were stimulated by the single or repeated removal of the gas from the swimbladder. In this group of fishes the changes in the organization of cytoplasm of the gas gland cells accompanying an intense production of gas have been studied. In the control animals, cells of the gas gland are packed with granules of glycogen except in the perivascular region. A high and protracted activity of the gland results in the disappearance of glycogen, in an increase of the number of cytoplasmic structures, especially the Golgi complex and lysosome-like bodies, and in a very strong proliferation of the external nuclear membrane. The function of the glandular cells and possible causes for the observed alterations in the cytoplasmic organization during an increased gas production are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00335444
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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