what are the five main parts of the brain?
['cerebrum (say: suh-REE-brum)', 'cerebellum (say: sair-uh-BELL-um)', 'brain stem.', 'pituitary (say: puh-TOO-uh-ter-ee) gland.', 'hypothalamus (say: hy-po-THAL-uh-mus)']