Nervous System Central Nervous System CNS Cell bodies: nuclei Neuron bundles: tracts Supporting cells: -Astrocytes -Oligodendrocytes -Microglial -Epididymal PNS Cell bodies: ganglia Neuron bundles: nerves Supporting cells: -Sattelite -Schwann Peripheral Nervous System Sensory (afferent) Somatic Nervous System (Voluntary movement (skeletal muscles), reflex arcs, relays sensory input, forwards motor commands) Motor (efferent) Autonomic Nervous System (Unconscious, involuntary regulation, cardiac and smooth muscle, glands) Parasympathetic Sympathetic (Fight or flight) (Rest and digest)