Localization of Two Types of Nerve Ending in the Corpus vasculare paracloacale of the Cock

Abstract

Localization of nerve ending in the corpus vasculare paracloacale (CVP) of the cock was studied electron microscopically. Two types of nerve ending were observed in the CVP. The first type contained small clear vesicles and large dense cored vesicles about 50 and 100 nm in diameter, respectively, while the second type contained small dense cored vesicles about 50 nm in diameter and large dense cored vesicles. The former was observed adjacent to pericytes or capillary endothelial cells and the latter was adjacent to small arteries.