Scanning electron microscopy of epiplexus macrophages (Kolmer cells) in the dog.

摘要: Young dogs (6–14 weeks) were perfused with buffered aldehydes by standard techniques. The inferior medullary velum and tela choroidea removed intact from the fourth ventricle, post-osmicated, dehydrated, critical point dried, coated palladium-gold examined in a Cambridge Stereoscan S4 scanning electron microscope. Selected samples after thorough routinely prepared for transmission microscopy (TEM). This study depicts numerous epiplexus (Kolmer cell) macrophages that exhibit extreme polymorphism. Because of pleomorphic nature these cells their processes, classification based on external morphology is not practical. TEM shows internal structure to be macrophage. Bleb-like structures bulbous projections appear emerge certain ependymal cell surfaces which seem completely or partially devoid cilia.