Relationships between nervous component histomorphogenesis of chick embryo spinal ganglia and development of their vascular supply in chorioallantoic grafts.

The blood vessel formation as well as the neuroblast differentiation were studied in chick embryo spinal ganglia grafted onto chorioallantoic membrane, and comparatively in those developing in situ under normal conditions. The preliminary results seem to indicate that also in the grafted spinal ganglia, as already suggested, in previous researches, for the orthotopically developing ganglia, the vascular networks apparently do not exert influences on the nervous substratum morphohistogenesis.