4.1 Central Nervous System

Transport: formed from the blood and circulates around and through ________ before re- entering blood capillaries- during this, it takes nutrients to the cells of the brain and spinal cord and carries away wastes.

Vertebral canal= opening in the vertebrae through which the ________ passes.

________; regulation of the heart, digestive system, appetite, thirst, metabolism, body temp, response to fear or anger.

________: part of cerebrum that is buried deep inside brain; 5 lobe.

________ gives white matter its colour and texture.

________: acts as shock absorber, cushioning any blows or shocks to CNS.

________: masses of grey matter inside each cerebral hemisphere.

________: brain is suspended inside cranium and floats in fluid that surrounds it.

________: receive and process nerve impulses from senses.

Motor: send impulses to muscles, especially for ________.

________ contains 70 % of all the neurons in CNS.

________: regulates diameter of blood vessels.

Inner: ________, delicate, contains blood vessels and sticks closely to surface of brain and spinal cord.

________: outer later, made up of grey matter.

________= communication network and control centre of body.

________ (PNS)= nerves that connect CNS w /receptors, muscles and glands.

Fluid produced in cavities of the brain; fills brain cavities and surrounds the brain and ________.

________= part of skull that houses the brain.

dura mater, tough and fibrous, sticks closely to bones of skull, texture similar to household rubber glove

arachnoid mater, loose mesh of fibres

pia mater, delicate, contains blood vessels and sticks closely to surface of brain and spinal cord

acts as shock absorber, cushioning any blows or shocks to CNS

brain is suspended inside cranium and floats in fluid that surrounds it

outer later, made up of grey matter

masses of grey matter inside each cerebral hemisphere

upward fold of the cerebral cortex of the brain; also called gyrus

shallow downfolds between convolutions of the cerebral cortex → deep down fold = fissure

frontal, temporal, occipital and parietal lobes

part of cerebrum that is buried deep inside brain; 5 lobe

receive and process nerve impulses from senses

send impulses to muscles, especially for voluntary movement

interpret info from senses and make it useful

regulates heartbeat

regulates breathing rate

regulates diameter of blood vessels