3d, 3 dimensional, three dimensional, artwork, nobody, no-one, foramen, cerebral aqueduct, nobody, subarachnoid, cerebrospinal, dura, interventricular, nervous system, no-one, brain stem, sylvius, luschka, cerebrospinal fluid, magendie, human body, inter ventricular, nervous, csf, interventricular, lateral ventricles, ventricles, ventricular, choroid, illustration, brain, diagram, biology, anterior, system, cerebellum, structure, lateral, anatomical, anatomy, monro, canal, cerebrum, horn, fourth, neurology, flow, cerebral, organ, ventricle, aqueduct, black background, isolated, bottom view