GENERAL HISTOLOGY

Detailed explanation-1: -The nerves arising directly from the spinal cord are called the spinal nerves. There are 31 pairs of spinal nerves in humans: 8 cervical, 12 thoracic, 5 lumbar, 5 sacral, and 1 coccygeal.

Detailed explanation-2: -There are 24 or 12 pairs of cranial nerves and 62 or 31 pairs of spinal nerves which constitute the peripheral nervous system or PNS.

Detailed explanation-3: -In total, there are 31 pairs of spinal nerves grouped regionally by spinal region. More specifically, there are eight cervical nerve pairs (C1-C8), twelve thoracic nerve pairs (T1-T12), five lumbar nerve pairs (L1-L5), 5 sacral (S1-S5), and a single coccygeal nerve pair.

Detailed explanation-4: -In humans there are 31 pairs: 8 cervical, 12 thoracic, 5 lumbar, 5 sacral, and 1 coccygeal. Each pair connects the spinal cord with a specific region of the body. Near the spinal cord each spinal nerve branches into two roots.

Detailed explanation-5: -There are 31 pairs of spinal nerves and roots. Eight pairs of cervical nerves exit the cervical cord at each vertebral level. One member of the pair exits on the right side and the other exits on the left.