Drawing of brain anatomy showing the brain stem, pons, medulla, spinal cord, cerebellum, cerebrum, meninges, ventricles (fluid-filled spaces), and skull.
Drawing of the inside of the brain showing ventricles (fluid-filled spaces), choroid plexus, hypothalamus, pineal gland, pituitary gland, optic nerve, brain stem, cerebellum, cerebrum, medulla, pons, and spinal cord.
Anatomy of the brain, showing the cerebrum, cerebellum, brain stem, and other parts of the brain.Anatomy of the inside of the brain, showing the pineal and pituitary glands, optic nerve, ventricles (with cerebrospinal fluid shown in blue), and other parts of the brain.

PubMed Health. A service of the National Library of Medicine, National Institutes of Health.