the brain- nervous system extended

label the parts of the brain

inside the cerebrum + label

cerebral cortex

outer surface of grey matter

basal ganglia

additional grey groups of nerve bodies associated with skeletal muscle to constrict- initiate desired movements inhibit unwanted movement

white matter

below cortex, consists of bundles of myelinated nerve fibres

motor areas

sensory areas

association areas

frontal lobe

thinking, problem-s, emotions, personality, language, control of movement.

parietal lobe

processes info, temp, taste, touch and movement

occipital lobe

vision

temporal lobe

processes memory and thinking with senses, receives auditory information

protection of the brain

1. bone (outermost protective layer), cranium (part of skell- protects brain

   spinal cord- runs through opening in vertebrae called the vertebral canal

2. membranes- meninges

   meninges- covering entire CNS- three layers of connective tissue forming membranes

3. fluid- cerebrospinal fluid- clear watery fluid containing a few cells and some glucose, protein, urea and salts.

   occupies space between middle and inner layer of meninges, circulates through cavities in the Brain and through canal in centre of spinal cord

protection of the spinal cord

acts as a shock absorber- cushions blows/ shocks CNS sustains

support- the brain as suspended in fluid

formed from blood and circulates through CNS before returning to capillaries

circulation allows delivery of nutrients/ removal of wastes from CNS

cerebrum (cerebral cortex)