Introduction of the Nervous Systems and Neurons

Coordinates and controls all bodily activities.

Nerves, brain, spinal cord, and sensory organs.

Eyes, ears, nose, skin, and tongue.

Brain and spinal cord.

To receive and process information and to regulate all bodily activity.

12 pairs of cranial nerves extending from the brain and 31 pairs of peripheral spinal nerves extending outward from the spinal chord.

To transmit nerve signals to, and from, the central nervous systems.

Is one or more bundles of neurons that connect the brain and the spinal chord with other parts of the body.

Bundle of nerve fibers located within the brain or spinal chord.

Carries nerve impulses TOWARD the brain.

Carries nerve impulses AWAY FROM the brain.

Nerve system made up of a cluster of nerve cell bodies outside the central nervous systems.

The supply of nerves to a specific body part.

• Network of intersecting spinal nerves.
• Also a network of intersecting blood or lymphatic vessels.

• Sites in the sensory organs that receive external stimulation.
• Sends the stimulus through the sensory neurons to the brain.

Anything that excites a nerve and causes an impulse.

Wave of excitation transmitted through nerve fibers and neurons.