anatomy - nervous system

Neuroglia

cells that support and protect neurons

Neurons

nerve cells that transmit impulses

Cell Body

contains the nucleus

Axons

conduct impulses away from the cell

Dendrites

conduct impulses toward the cell

Myelin Sheath

fatty material that protects nerve fibers

Sensory Neurons

carry impulses from sensory receptors to central nervous system

Motor Neurons

carry impulses from central nervous system to muscles and glands

Association Neurons

connect motor and sensory neurons

Cranial Nerves

come from brain

Spinal Nerves

come from spinal cord

Meninges

3 connective tissue membranes cover brain

Central Nervous System

made up of the brain and spinal cord

Peripheral Nervous System

nerves that extend from brain and spinal cord

Sensory Division

from sensory receptors to central nervous system

Motor Division

from central nervous system to muscles/glands

Somatic

voluntary (ex: skeletal muscles)

Autonomic

involuntary (ex: cardiac, smooth muscle, glands)

Sympathetic

fight or flight

Parasympathetic

resting and digesting