In man, the nervous organization consists of cardinal nervous organization (CNS), autonomic nervous organization (PNS) in addition to autonomic nervous organization (ANS). Central nerves organization (CNS) includes encephalon in addition to spinal cord, peripheral nervous organization (PNS) includes cranial nerves in addition to spinal nerves. The autonomic nervous organization (ANS) includes nervus chains on either side of the vertebral column. It includes sympathetic in addition to parasympathetic divisions.
The ANS regulates the internal environs of the animal’s trunk yesteryear controlling smoothen in addition to cardiac muscles in addition to other involuntary actions. ANS consisting of motor nerves in addition to ganglia. ANS is too called visceral efferent nervous system, is made upwards of 2 opposing divisions -sympathetic in addition to parasympathetic.
Sympathetic nervous organization (Thoracico-lumbar outflow) is represented by 21 sympathetic ganglia on either side of spinal cord. It receives preganglionic sympathetic fibres from the spinal cord which brand their cash inwards one's chips along amongst thoracic in addition to lumbar nerves.
Parasympathetic nervous organization (Cranio sacral outflow) consists of preganglionic para sympatheic fibres, parasympathetic ganglia in addition to postganglionic parasysympathetic fibres.
Sympathetic Nervous organization vs Parasympathetic Nervous System
Sympathetic Nervous system | Parasympathetic Nervous System |
Preganglionic nervus fibre is pocket-size sized | Preganglionic nervus fibre is larger |
Dilates pupil | Constricts pupil |
Increases lacrimal glands secretion | Inhibits lacrimal glands secretion |
Inhibits salivary in addition to digestive glands | Stimulates salivary in addition to digestive glands |
Accelerates pump beat | Retards pump beat |
Inhibits gut peristalsis | Stimulates gut peristalsis |
Contracts anal sphincter | Relaxes anal sphincter |
Relaxes urinary bladder | Contrasts urinary bladder |
Vasoconstriction inwards full general in addition to vasodilation (brain, heart, lungs in addition to skeletal muscles | Vasodilation of coronary vessel |
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