The nerves, the brain and the spinal cord constitute the nervous system. Nervous system controls and regulates the activities of all the other systems of the body.

Brain

Brain is the main organ of the nervous system. The brain consists of cerebrum, cerebellum and medulla oblongata.

Cerebrum

ADVERTISEMENTS:

It controls voluntary actions and is the seat of intelligence. It is the largest part of the brain.

Cerebellum-

It regulates muscular movement of locomotion.

Medula Oblongata

ADVERTISEMENTS:

It is the lowermost part of the brain which j continues as the spinal cord in the vertebral column. It controls in I voluntary actions.

Spinal Cord-

The spinal cord is the elongated nearby cylindrical continuation of medulla oblongata. Spinal cord is the centre of various reflex actions.

Sense Organs

ADVERTISEMENTS:

There are several organs in the body-.that receive the external and internal stimuli and convey it to central i nervous system. The main sense organs are hearing, vision, smell and teste, i.e. Eye, Skin, Tongue, Ear, Nose etc.