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The Senses

TermDefinition
Cornea Allow light to enter
Conjunctiva outer layer of the cornea protects the eye against infection
Lens Focuses light on the retina
Retina Contains rods and cones Converts light into nerve impulses
Sclera Protective outer layer of the eye
Choroid Contains blood vessels to nourish the eye
Iris Controls the amount of light entering the eye
Pupil Lets light into the back of the eye
Cillary muscle Controls the shape of the lens
Fovea Contains cones provide colour
Blind spot No rods or cones
Vitreous humour Fluid that give the eye its shape
Optic nerve Carries impulses from rods and coned to the brain
Pinna Collects sound
Auditory canal Carries vibrations to the eardrum Wax traps dust and bacteria
Eardrum Tightly stretched membrane carries vibrations to the middle ear
Ossicles Contains three bone: Hammer, anvil and stirrup amplify vibrations from the eardrum
Semi circular canals Control balance
Cochlear (audiotry) nerve Carries impulses fro the cochlea to the brain
Cochlea Converts sound to nerve impulses
Eustachian tube Connected to the pharynx equalises pressure
Created by: reid k
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