B2: The Mammalian Eye- structure and function 0.0 / 5 ? BiologyCells, tissues and organsGCSEAQA Created by: bichonfriseeCreated on: 30-04-16 23:59 Iris Coloured sheet of muscle which controls the amount of light that enters the eye by changing the size of the pupil 1 of 17 Eyelid Protects the eye from physical harm 2 of 17 Cilliary Muscles Changes the shape of the lens when they contract/ loosen 3 of 17 Vitreous humour Jelly- like fluid that is in the entire inside of the eye; it helps keep the shape of the eyeball and also bends the light onto the retina 4 of 17 Retina Layer of light sensitive cells which send impulses to the optic nerve 5 of 17 Fovea Small area of the retina which only contains cones 6 of 17 Blind spot A point at the back of the eye where the optic nerve is connected to the eye; there is no retina here 7 of 17 Sclera Tough, strong outer layer which protects the eye and has many blood vessels which supply the retina with oxygen and energy 8 of 17 Chloroid Dark, pigmented layer which absorbs light and stops it being reflected back into the eye 9 of 17 Suspensory ligaments Holds the lens in place and is connected to the cilliary muscles 10 of 17 Lens Clear disc which focuses the light onto the retina which allows a fine focus 11 of 17 Pupil The hole in the middle of the iris, which allows light to enter the eye 12 of 17 Conjunctiva Thin, clear protective layer over the surface of the eye 13 of 17 Aqueous humour Fluid that fills the front of the eye and helps bend light into the retina 14 of 17 Cornea Clear area of the sclera which helps to bend light onto the retina 15 of 17 Aqueous humour Fluid that fills the front of the eye and helps bend light into the retina 16 of 17 Cornea Clear area of the sclera which helps to bend light onto the retina 17 of 17
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