nerve cells neurons
gap between two neurons synapse
neuron that carries impulses from brain or spinal cord to other organs motor neurons
protects brain skull
structure that carries messages between the brain and the other parts of the body spinal cord
largest part of the brain cerebrum
part of the brain that controls functions necessary for life medulla
single long strand that comes out of the other side of the cell body axon
actions that happen automatically and do not involve the brain reflex
brain and spinal cord make up this central nervous system