Brain Ventricles
Dissected Sheep Brain
Cerebral Hemisphere
Equine Brainstem
Ventricular system: [NOTE: * = not paired]
two lateral ventricles - within telencephalon
(two interventricular foramina — to third ventricle)
third ventricle* - mostly diencephalon
mesencephalic aqueduct* - within mesencephalon
fourth ventricle* - within hindbrain
(two lateral recesses/foramina — to subarachnoid space)
central canal* - within spinal cord
Blood supply:
internal carotid arteries - trifurcate
(form an arterial circle on ventral surface of brain)
basilar artery*
(arises from terminations of vertebral aa.)