GENERAL HISTOLOGY

Detailed explanation-1: -The grey matter surrounding the cerebrum is known as the cortex of the brain.

Detailed explanation-2: -White matter is found in the deeper tissues of the brain (subcortical). It contains nerve fibers (axons), which are extensions of nerve cells (neurons). Many of these nerve fibers are surrounded by a type of sheath or covering called myelin. Myelin gives the white matter its color.

Detailed explanation-3: -The white matter is found in the inner layer of the cortex, the optic nerves, the central and lower areas of the brain or brainstem, and surrounding the central shaft of gray matter in the spinal cord.