Neurons and glia: Neurons are the basic functional units of the brain

Neurons and glia linsert to the top right of the brain). Neurons (dark blue) are the basic functional units of the brain. Two major parts ofa neuron are the cell body. which has exlensiorts called dendrites that receive messages from other neurons. and a tail-like extension called an axon. through which electrical messages called action potentials travel Also shown are two types of glra Astrocytes llight blue). which serve diverse functions, and oligodendrocytes (green). which insutate axons by coating them with myelin (pink). Defld 'le " Axon