Nervous System

Central Nervous System Peripheral Nervous System

Efferent (Motor) Division Afferent (Sensory) Division

Somatic Motor NS Autonomic NS

Sympathetic Division Parasympathetic Division Enteric NS

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Salivary glands

Heart

Lung

Stomach Spleen Pancreas

Small intestine

Large intestine

Rectum

Kidney

Bladder Penis

Scrotum Uterus

Ovary

Pons

Regions of spinal cord Thoracic Cervical Lumbar Sacral

Eye

Adrenal medulla

Preganglionic neurons Postganglionic neurons

Postganglionic fibers to skin, blood vessels, adipose tissue

Sympathetic chain ganglia

Liver and gallbladder

Inferior mesenteric ganglion

Superior mesenteric ganglion

Celiac ganglion

Cardiac and pulmonary plexuses

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Lacrimal gland

Heart

Lung

Stomach

Pancreas

Small intestine

Rectum

Bladder Penis

Scrotum Uterus

Ovary

Ciliary ganglion

Spleen

Descending colon

Otic ganglion

Cardiac plexus

Eye

Thoracic

Cervical

Lumbar

Sacral

Preganglionic neurons

Postganglionic neurons

Pterygopalatine ganglion

Oculomotor n. (CN III)

Submandibular ganglion

Facial n. (CN VII)

Submandibular salivary gland

Parotid salivary gland

Glossopharyngeal n. (CN IX)

Vagus n. (CN X)

Pulmonary plexus

Esophageal plexus

Celiac ganglion

Abdominal aortic plexus

Pelvic splanchnic nerves

Inferior hypogastric plexus

Liver and gallbladder

Kidney and ureter

Transverse colon

Pelvic nerves

Regions of spinal cord

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Artery

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Strong sympathetic tone

Smooth muscle contraction

Vasoconstriction

Weaker sympathetic tone

Smooth muscle relaxation

Vasodilation

Sympathetic nerve fiber

Vasomotor tone

(a) Vasoconstriction

(b) Vasodilation 12  

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