[The structural organization of the vascular plexus of the endbrain in the human embryo at the 8th week of development].

Choroid plexus of human 8 wks old telencephalon embryo was studied using light and electron microscopy and immunocytochemistry. Precise description of epithelial cells and choroid plexus stroma ultrastructure is given as well as distribution of vimentine interstitial filaments in epithelial cells cytoplasm. The structure of choroid plexus blood vessels was studied. Smooth myocytes were not found in blood vessel wall. Vascular wall consists of single layer of endotheliocyte lacking basal membrane. At this stage of development endothelium was not fenestrated. Based on morphological data conclusions were made of fundamental condition of choroid plexus tissue elements.