The ependyma and vascular pia mater – the tela choroidea, form regions of minute projections known as a choroid plexus that projects into each ventricle. The choroid plexus produces most of the cerebrospinal fluid of the central nervous system that circulates through the ventricles of the brain, the central canal of the spinal cord, and the subarachnoid space. The tela choroidea in the ventricles forms from different parts of the roof plate in the development of the embryo.
The ependyma and vascular pia mater – specifically the tela choroidea – generate structures called choroid plexus, which project into each ventricle. These structures produce a significant portion of cerebrospinal fluid in the central nervous system that circulates through the brain’s ventricles, spinal cord’s central canal, and subarachnoid space. The tela choroidea forms within the ventricles from different parts of the roof plate during embryonic development.