Page 11 - Health & Physical edu- 8

a. Central Nervous System

b. Peripheral Nervous System Cerebrum

c. Autonomic Nervous System

Mid Brain
Cerebellum
A. Central Nervous System

Pons Varolii
The main parts of the central nervous system
are brain and spinal cord.
Spinal cord Brain

i. The Brain

The white-coloured element in the skull is the brain. Its weight in adults is around
1400 grams. It includes hundreds of thousands of neurons. It consists of the following
parts.

Cerebrum: Cerebrum lies at the top of the brain. It covers the large part of the brain.
This part controls and regulates memorizing, arguing, thinking, differentiating, and
analyzing. This is also the centre of generating the sensations for warmth, smell,
taste, hearing, and viewing. This part of the brain controls the functions of other
parts of the brain. This part also activates the muscles and glands of the body.

Cerebellum: Cerebellum lies just below the posterior part of cerebrum. It balances
the physical movement. It controls and balances the muscular activities while

walking and running. This part also delivers the sensations obtained to cerebrum.

Mid Brain: Mid brain lies between cerebrum and pons varoli. It delivers the
messages obtained from the spinal cord to cerebrum and sends the instructions of
the cerebrum to the spinal cord.

Pons Varoli: Pons varoli lies between mid-brain and medulla oblongata. It also
delivers the messages to and from spinal cord and cerebrum.

Health & Physical Education, Class-8 7