Coordination and control - The nervous system - Edexcel The brain
The nervous system enables humans to react to their surroundings and to coordinate their behaviour. It comprises billions of neurones, and it uses electrical impulses to communicate very quickly.
The brain controls complex behaviour. It is made of billions of interconnected neuroneNerve cells. They carry an electrical message or impulse when stimulated. and has different regions that carry out different functions.
The brain contains the following main areas:
cerebral hemispheres
cerebellumThe part of the brain that controls balance and co-ordination
medullaThe part of the brain controlling breathing, heart rate and peristalsis.
Figure caption,
The structure of the brain
There are four main areas in the brain:
Cerebral hemispheres
The cerebrum's outer layer, it is split into two hemispheres and is highly folded. These two hemispheres make up the cerebral cortex. This controls most of our senses, intelligence, personality, conscious thought and high-level functions, such as language and verbal memory.
Cerebellum
Controls balance, co-ordination of movement and muscular activity.
Medulla oblongata
Controls unconscious activities such as heart rate and breathing rate.
Hypothalamus
Regulates temperature and water balance within the body.
Cerebral hemispheres
The cerebrum's outer layer, it is split into two hemispheres and is highly folded. These two hemispheres make up the cerebral cortex. This controls most of our senses, intelligence, personality, conscious thought and high-level functions, such as language and verbal memory.
Cerebellum
Controls balance, co-ordination of movement and muscular activity.
Medulla oblongata
Controls unconscious activities such as heart rate and breathing rate.
Hypothalamus
Regulates temperature and water balance within the body.