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ANS (MO) - Human Anatomy The Autonomic Nervous System ANS...

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Human Anatomy The Autonomic Nervous System ANS
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ANS Regulates various physiological processes unconsciously, for instance: 1. Cardiovascular 2. Respiration 3. Digestion 4. Body temperature 5. Excretion
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2 Subdivisions of the ANS 1. Sympathetic NS “fight or flight” 1. Parasympathetic NS “rest and repose”
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Anatomy of ANS Consists of only 2 neurons 1. Preganglionic neuron (#1) 2. Ganglionic neuron (#2) The ganglion is a structure where the axon of the preganglionic neuron synapses (release of neurotransmitter) with the ganglionic neuron (dendrite or cell body) The axon of the ganglion synapses with the target cell or organ.
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Anatomical differences between sympathetic and parasympathetic
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Anatomy of the ANS Differences between sympathetic and parasympathetic are: 1. Location of preganglionic (#1) cell body 2. Location of the ganglia 3. Neurotransmitters released at synapses 4. Effects on target organs
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1. Sympathetic Anatomy Once again, just 2 cells Preganglion (#1) cell body in gray matter of spinal cord ---- levels T 1 – L 2 Thoracolumbar system
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Sympathetic Anatomy Thoracolumbar
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