Biology - The nervous system keywords

central nervous system
- brain and spinal chord
- control region
- recieves information, processes and sends messages

peripheral nervous system
- vast network of nerves and cell bodies
- carries impulses throughout the body to and from the CNS

the cell bodies of the peripheral nervous system are located in groups called ganglia, found outside the CNS in vertebrae close to the spinal chord

- fills the space between the inner two meninges
- acts as a protective shock absorber
- exchange medium between the blood and brain

- largest part of the brain
- contains 75% of nerve cells in the brain
- right hemisphere controls left hand side of the body
- left hemisphere controls right side of the body

a bundle of nerve fibres that allows the two sides of the cerebrum to comunicate with each other

the outer layer of the cerebrum, its heavily folded to increase surface area

- muscles
- the senses
- learning
- emotions
- memory
-understanding

second largest part of the brain, at the back of the brain. is a thin heavily folded layer.
Controls:
- muscular coordination
- balance

walnut sized, below the cerebrum. Acts as a sorting centre for the brain

below the thalamus
- regulates internal enviornment of body( homeostasis) monitors appetite, thirst, body temp ect
-links with pituatary gland to regulate the production of many hormones

a swelling at the top of the spinal chord, controls involuntary actions eg breathing, swallowing, vomiting ect

a nerve cell / basic units of the nervous system and are specialised to carry info from one place to another within the body.

carry electrical impulses from sense organs to the central nervous system.

carry electrical impulses between sensory neurons and motor neurons ( not enclosed in meylin sheaths)

carry electrical impulses from the central nervous system ( to a muscle or gland)

a region where two neurons come into close contact

the tiny gap between the two neurons at a synapse