they arise from spinal cord in human being, these are 31 pairs of spinal nerves. Divided into 5 pairs.

(1)   Cervical  8 pairs

(2)   Thoracic  12 pairs

(3)   Lumbar  5 pairs

(4)   Sacral  5 pairs

(5)   Coccygeal 1 pairs

Related Keywords
11    PMT    Biology    Neural Control and Coordination    Spinal Nerves