Brain consists of main three parts and **** in the cranial cavity of skull.
The cerebrum
The cerebellum
The medulla oblongata
Cerebrum: It is very large and form two third of the whole brain. The two hemispheres are separated from each other by a deep longitudinal groove, the median fissure. The outer surface is folded with ridges and grooves. The hemispheres are hollow from inside and their walls have outer and inner portions. The outer portion has cell bodies of the neurons and it is called grey matter.
The wavery edges of the folded layer has large number of neurons to the extent of nine billion. The inner portion of the cerebrum has axons and it is called white matter.
Functions:
It controls all the voluntary activities.
It is the seat of intelligence, consciousness and will power.
