EVERYDAY SCIENCE

Detailed explanation-1: -The peripheral nervous system refers to parts of the nervous system outside the brain and spinal cord. It includes the cranial nerves, spinal nerves and their roots and branches, peripheral nerves, and neuromuscular junctions.

Detailed explanation-2: -The cranial nerves are considered components of the peripheral nervous system (PNS), although on a structural level the olfactory, optic and terminal nerves are more accurately considered part of the central nervous system (CNS). The 12 pairs of cranial nerves are special nerves associated with the brain.

Detailed explanation-3: -There are 12 pairs of cranial nerves and 31 pairs of spinal nerves which constitute the peripheral nervous system or PNS.

Detailed explanation-4: -The central nervous system is made up of the brain and spinal cord. The peripheral nervous system is made up of nerves that branch off from the spinal cord and extend to all parts of the body.