| A | B |
|---|
| afferent neurons | a nerve that carries nerve impulses from the periphery to the central nervous system |
| arachnoid mater | web-like middle membrane of the meninges |
| axon | single, elongated branch wihc receives electrical impulses and releases neurotransmitter into the synapse |
| cerebral cortex | a layer of gray matter covering the upper and lower surfaces of the cerebrum |
| choroid plexus | network of blood vessels of the pia mater which help in the formation of cerebrospinal fluid |
| column | white matter found in the spinal cord that acts as nerve tracts and pathways |
| corpus callosum | wide band of axonal fibers that holds together the middle region of the two brain hemispheres |
| dendrites | branches at the end of a neuron that carry information to the cell body |
| dorsal root | sensory root of each spinal nerve |
| dura mater | outermost covering of the brain and spinal cord |
| efferent neurons | a nerve that carries messages from the brain and spinal cord to the muscles and glands |
| fissure | deep groove on the surface of the brain and spinal cord |
| gyri | convolutons (elevations) in the brain |
| horns | gray matter in spinal cord that contain neuron cell bodies |
| meninges | coverings of the brain and spinal cord |
| myelin | fatty sheath around the axon of a neuron |
| neuroglia | network of cells that hold neurons in place |
| neuron | a nerve cell |
| nodes of Ranvier | constriction of the myelin sheath on a myelinated nerve fiber that facilitates nodal transmission of the impulse |
| pia mater | innermost vascular covering of the brain and spinal cord |
| satellite cells | neuroglia cells that enclose the cell bodies of neurons in the spinal ganglia |
| Schwann cells | cells that form myelin sheaths around axons of cranial & spinal nerves |
| sulci | shallow grooves separating cerebral convolutions |
| synapse | space between axon of one neuron and the dendrite of the next neuron |
| ventral root | motor root of each spinal nerve |
