•Nervous system of animals examined in two region
•Peripheral nervous system; sensory neurons, afferent and efferent nerves and ganglia
•Central Nervous system; Spinal cord and brain
•Somatic afferents and efferents innervate somatic organs that are voluntarily controlled.
•Autonomic afferents and efferents innervate autonomic organs such as heart and digestive channal.
•Cranial nerves innervate usually the muscle and gland of head. They originate from brain stem
•Sensory or receptor cells are stimulated by physical stimuli and localized in various sensory region of the body.
•Environmental information is only recieved by receptor cell or sometimes free afferent nerve endings
Anatomy of Vertebrate Nervous Systhem
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