Drawing of the inside of the brain showing  the lateral ventricle, third ventricle, and fourth ventricle, cerebrum, choroid plexus, hypothalamus, pineal gland, pituitary gland, optic nerve, tentorium, cerebellum,  brain stem, pons, medulla, and spinal cord.
Anatomy of the inside of the brain, showing the cerebrum, cerebellum, brain stem, spinal cord, optic nerve, hypothalamus, and other parts of the brain.