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Thursday, April 21, 2011

Nervous System

ORGANIZATION OF NERVOUS SYSTEM

Nervous System
a) Central Nervous System: Interneuron
- Brain (refer The brain)
- Spinal cord


SPINAL CORD
- protected by vertebrae
- composed of:
a) Cervical
b) Thoraxic
c) Lumbar
d) Sacrum
e) Coccyx
- Function:

  • link the CNS and PNS
  • control reflex action


REFLEX ACTION
- spontaneous
- fast
- unplanned event/ sequence
- Function: Protection
- Component:
a) Sensory neuron: Sensory organ
b) Interneuron: Spinal cord (integrating center)
c) Motor neuron: Muscle & glands




b) Peripheral Nervous System: Sensory neuron & motor neuron
- Autonomic Nervous System
- Somatic Nervous System
- Enteric Nervous System