Divisions Of The Nervous System

Front 1

Consists of the brain and spinal cord.

Back 1

Central nervous system

Front 2

Consists of nerves, ganglia, and plexuses; located outside the central nervous system.

Back 2

Peripheral nervous system

Front 3

PNS subdivision; action potentials go from sensory receptors to the central nervous system .

Back 3

Sensory (afferent) division

Front 4

PNS subdivision; action potentials go from the central nervous system to effector organs, such as muscles and glands.

Back 4

Motor (efferent) division

Front 5

Part of the motor division that conducts action potentials from the central nervous system to skeletal muscle.

Back 5

Somatic nervous system

Front 6

Part of the motor division that conducts action potentials from the central nervous system to smooth muscle, cardiac muscle, and glands.

Back 6

Automatic nervous system

Front 7

Automatic division; prepares the body for physical activity (fight or flight).

Back 7

Sympathetic division

Front 8

Automatic division; regulates resting or vegetative functions.

Back 8

Parasympathetic division

Front 9

Consists of plexuses within the wall of the digestive tract.

Back 9

Enteric nervous system

Front 10

Major site for processing information, initiating responses, and integrating mental processes.

Back 10

Central nervous system

Front 11

Bundles of axons and their sheaths that connect the CNS to sensory receptors, muscles, and glands.

Back 11

Nerves

Front 12

Number of cranial nerve pairs in the PNS.

Back 12

12

Front 13

Number of spinal nerve pairs in the PNS.

Back 13

31

Front 14

Collections of nerve cell bodies outside the CNS.

Back 14

Ganglia

Front 15

Extensive network of axons - and, in some cases neuron cell bodies - located outside the CNS.

Back 15

Plexus