1. Describe the anatomy and function of the human nitty-gritty. Conjunctiva- a gravid membrane that covers the surface of the eye and the at bottom of eyelids. Protects the earlier of the eye. Cornea- The front fortune of the eyeball. It is mobile, relatively thick. Bends argus-eyed rays as they cave in through it. Sclera- unvarying with the cornea but not transparent. Forms tough colour outer keister unwrap of eyeball. Protects the eye, helps maintain its manakin. Choroid- lies on the inside of sclera, think black pigmented layer containing blood vessels. rouge absorbs crop light preventing false images. Retina- Innermost layer of eye. Lines masking of eyeball, contains light gauzy cells or photoreceptors and nerve fibres. Receives the light and changes it in to electric impulses that travel to the wiz via the optic nerve. Iris- coloured part at front of eye, composed of muscles. Regulates the nub of light entering the eye. Lens- transparent biconvex p rotein disc lowlife the pupil. Focuses light rays on to the retina. aqueous wit and Vitreous humor- aqueous humor is viscose liquid that fills the front chamber of the eye. Vitreous humor is jelly-like and fills the larger back chamber of the eye. Help keep the eyeball in shape and also wrinkle rays of light as they pass through.
ciliary body- connects the choroid with the lens. It contains suspensory ligaments and ciliate muscles. Ligaments hold the lens in position and ciliary muscles alter the shape of the lens. optical nerve- connects eye with brain. The region where the optic nerve leaves the eye is kn own as the blur spot because it has no phot! oreceptors so it cant produce an image. Carries tense signals from retina to visual cerebral cortex of the brain, which interprets them as, images. 2. a) Explain the term refraction in relation to... If you want to frustrate a full essay, pronounce it on our website:
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