Japanese Journal of Veterinary Research;Volume 23, Number 1

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FINE STRUCTURES OF CORPUS PARACLOACALIS VASCULARIS IN COCKS

SUGIMURA, Makoto;KUDO, Norio;YAMANO, Shuji

Permalink : http://hdl.handle.net/2115/2060
JaLCDOI : 10.14943/jjvr.23.1.11

Abstract

The corpus paracloacalis vascularis in cocks was observed under scanning (SEM) and transmission electron microscopes (TEM). Under the SEM it was clearly demonstrated that the organs consisted of the capsule, trabeculae, capillary cords and lymphatic spaces. The capillary cords were arranged in anastomosing thick columns or sheets partitioned by lymphatic spaces under the SEM. The fine structures of the lymphatic spaces perfectly corresponded with the ordinary lymphatic capillaries under the TEM. The blood capillaries in the capillary cords consisted of a layer of endothelial cells and comparatively numerous pericytes, but some characteristic features were noted ; the endothelial cells were surrounded by a thicker, denser basement membrane and included numerous dilated rough-surfaced endoplasmic reticulums and unusual large pinocytotic vesicles, 300~500 mμ in size, which were often opened on the inner and outer surfaces of the endothelium.

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