Ultrastructure of Capillaries in the Conduction System of the Heart in Various Mammals

Overview

Journal Cell Tissue Res

Specialties Anatomy & Histology
Cell Biology

Date 1978 Aug 25

PMID 688375

Citations 3

Authors

E Weihe

P Kalmbach

Affiliations

Soon will be listed here.

Abstract

The capillaries in the atrioventricular node and atriventricular bundle of the heart (mammals) were investigated by thin sections and freeze-etch replicas. Fenestrated endothelial cells were found to occur in all mammals examined in this study. These fenestrations (500 +/- 50 A diameter) are bridged by a diaphragm and occur in relatively small sieve areas. In contrast to the AV-node and AV-bundle, the non-specialized myocardium is supplied by continuous capillaries. The presence of the fenestrated capillary in the conduction system of the heart may serve to increase both permeability and passive transport capacity.

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