Scanning electron microscopy studies of the vascular pole of the rat glomerulus

Authors

  • Martina Frank,

    1. Institute of Anatomy, University of Heidelberg, Heidelberg, Federal Republic of Germany
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  • Dr. Wilhelm Kriz

    Corresponding author
    1. Institute of Anatomy, University of Heidelberg, Heidelberg, Federal Republic of Germany
    • Anatomisches Institut I der Universität Heidelberg, Im Neuenheimer Feld 307, 6900 Heidelberg 1, Federal Republic of Germany
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Abstract

The vascular poles of 30 renal corpuscles were studied in critical-point dried renal cortex of the Munich-Wistar rat by scanning electron microscope (SEM). In 28 cases one afferent and one efferent arteriole were observed; one afferent and two efferent arterioles were found in two cases only. The same study was done in the Sprague-Dawley rat, where 34 renal corpuscles were examined. One afferent and a single efferent arteriole were found in 32 cases; in one case only one afferent and two efferent arterioles were observed. In another case it was questioned whether a single or a double efferent arteriole arteriole is present. In addition, the specimens allowed an evaluation of the area where the extraglomerular mesangium passes into the mesangial cells of the glomerular tuft. This area was found to be rather small to represent a “punctum fixum” for a contraction of the entire mesangium.

Ancillary