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The structure and function of the brain in the central nervous system

The human brain

The central nervous system is composed of the brain and the spinal cord , the brain is a nerve block containing millions of the nerve cells ( the neurons ) and it is the main control center in your body .

The brain is located inside a bony box called the skull to protect it , It directs and coordinates all the processes ideas , the behaviours and the emotions , and it weights about 1.5 kg in the adult human .

The brain of the human consists of three main parts which are the cerebrum ( two cerebral hemispheres ) , the cerebellum and the medulla oblongata .

The brain

The brain structure of the human.

The cerebrum ( the two cerebral hemispheres )

The cerebrum is the largest part of the brain ?  It is divided into two halves ( the right and the left ) called the two cerebral hemispheres , The cerebral hemispheres are separated by a fissure and attached to each other through  the nerve fibres .

The outer surface of the two hemispheres is called the cerebral cortex and it is a grey matter , but the inner surface is called the white matter , The two hemispheres have many convolutions and folds on their surface .

The function of the cerebrum

The cerebrum is a very important part in the brain as it control the voluntary movements of the body such as running in the races , The cerebrum contain the centers of thinking and memory ( the concentration ) .

The cerebrum receive the nerve impulses from the sense organs ( the eyes , the ears , the nose , the tongue and the skin ) and send the suitable responses to these impulses .

The cerebellum

The cerebellum lies at the back area of the brain below the two cerebral hemispheres , and it maintains the balance of the body during the movement .

The medulla oblongata

The medulla oblongata lies in front of the cerebellum , and it connects the brain with the spinal cord .

The function of the medulla oblongata

Damage to the medulla oblongata causes the death , and it is responsible for regulating the involuntary processes of the body as regulating the heartbeats .

The medulla oblongata regulates the movement of the respiratory system parts during the breathing , The medulla oblongata regulates the movements and functions of the digestive system .

Nervous system in man , Nerve cells types & Nature of nerve impulse 

Nervous system ( Central nervous system , Peripheral nervous system & Autonomic nervous system )

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