Developmental studies on the rat vomeronasal organ: vascular pattern and neuroepithelial differentiation. II. Electron microscopy.

The present electron microscopical study demonstrates that the establishment of the typical vascular pattern of the rat vomeronasal organ by the eighteenth day of gestation is accompanied by neither complete maturation of the wall of the blood vessels nor of the vomeronasal neuroepithelium. In the newborn rat, however, the vasculature and the neuroepithelium of the vomeronasal organ present morphological elements suggesting functional capability at birth.