What do the 11 parts of the human eye do?

Answer 1

AQUEOUS HUMOUR - watery liquid; nourishes the cornea, maintains the shape of the front of eye

BLIND SPOT - where the optic nerve leaves the eye; contains neither rods nor cones

CHOROID - absorbs light, prevents internal refraction, contains blood vessels

CILIARY MUSCLES - ring of muscles; changes the shape of the lens

CONJUNCTIVA - delicate mucous membrane, attached to the cornea; covers the front part of the eye

CORNEA - transparent outer layer; allows light through, refracts light rays

FOVEA - shallow pit on the retina, contains no blood vessels; contains cones, responsible for sharp vision

IRIS - pigmented part of the eye; contracts/relaxes the circular and radial muscles to change pupil size

LENS - transparent; changes shape to focus image on retina

OPTIC NERVE - carries nerve impulses from the retina to the brain

PUPIL - hole in the choroid, appears as a black dot in the iris; determines the amount of light entering the eye

RETINA - light sensitive membrane; contains rods and cones, receives image from the lens

SCLERA - tough outer layer; offers protection from mechanical injury, provides area for muscle attachment

VITREOUS HUMOUR - jelly-like fluid, transparent; supports the lens, helps to maintain the shape of the eye

Answer 2

The seven main parts of the eye are the sclera, pupil, lens, cornea, optic nerve, retina and iris.

Answer 3

what are the vital parts of the human eye

Answer 4

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