In what way the grey and white matter of the brain and the spinal cord differs.

Explanation

The superficial region of the cerebrum is called cerebral cortex, which looks grey due to the presence of unmyelinated nerve cells. Cerebral cortex consists of neuronal cell body, dendrites, associated glial and blood vessls. Inner to the cortex is medulla which is white in colour and acts as a nerve tract between teh cortex and the diencephalon. In contrast to the brain, the grey matter in the spinal cord forms an inner butterfly shaped region surrounded by the outer white matter. The grey matter consists of neuronal cell bodies and their dendrites, interneurons and glial cells. White matter consists of bundles of nerve fibres. In the centre of the grey matter there is a central canal which is filled with CSF.