MEDICAL PHYSIOLOGY

Detailed explanation-1: -The central nervous system is made up of the brain and spinal cord.

Detailed explanation-2: -The spinal cord is composed of gray and white matter, appearing in a cross-section as H-shaped gray matter surrounded by white matter. The gray matter consists of the cell bodies of motor and sensory neurons, interneurons, and neuropils (neuroglia cells and mostly unmyelinated axons).

Detailed explanation-3: -The central nervous system consists of the brain and the spinal cord. 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.