© 1967 by European Society of Cardiology
Copyright © 1967, European Society of Cardiology
Fine Structure of the Endocardium in Adult Rats*
From the Department of Anatomy, University of Alberta, Edmonton, Alberta, Canada
Authors' Synopsis: The endocardial endothelium is a complete layer with nuclei protruding into lumina, and greatly attenuated cytoplasm showing active micropinocytosis. Endothelial cell junctions characteristically are complex with interdigitation and overlapping of cytoplasmic processes. Subendothelial connective tissue is loose and collagenous, except in heart valves. Some elastin is present at the aortic ring but absent elsewhere.
* Supported by Medical Research Council of Canada, Grant MT-880.