THORAX ABDOMEN AND PELVIS

Detailed explanation-1: -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-2: -The peripheral nervous system consists of the nerves that branch out from the brain and spinal cord. These nerves form the communication network between the CNS and the body parts. The peripheral nervous system is further subdivided into the somatic nervous system and the autonomic nervous system.

Detailed explanation-3: -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. They are a part of the peripheral nervous system.

Detailed explanation-4: -There are basically two major types of nerves: sensory and motor. Sensory nerves send information such as touch, temperature, and pain to the brain and spinal cord. Motor nerves send signals from the brain back into the muscles, causing them to contract either voluntarily or reflexively.