Brain different regions:
Cerebrum:
This is largest part of our brain and consists of two cerebral hemispheres.
These hemispheres are joined with each other with the help of tough fibres and nerve tracts.
The cerebrum occupies two-thirds of the brain. Hence, it is also called the large brain.
Its surface has deep, irregular ridges and grooves which are called convolutions. Convolution increases the surface area of the cerebrum and therefore a large number of nerve cells can be accommodated.
Cerebellum:
This is the smaller part of the brain situated below the cerebrum at the back of the cranial cavity.
Its surface shows shallow grooves instead of deep convolutions.
Medulla oblongata :
This is the hind-most part of brain.
There are two triangular swollen structures called pyramids on the upper side of medulla oblongata.
The medulla oblongata continues downwards as the spinal cord.