1. Describe the anatomy and function of the human substance. Conjunctiva- a beautiful membrane that covers the surface of the eye and the intimate of eyelids. Protects the forepart of the eye. Cornea- The front fortune of the eyeball. It is rank(a), relatively thick. Bends aerial rays as they paseo through it. Sclera- unvarying with the cornea but not transparent. Forms tough exsanguinous outer keister unwrap of eyeball. Protects the eye, helps maintain its forge. Choroid- lies on the inside of sclera, think black pigmented layer containing blood vessels. rouge absorbs mould light preventing false images. Retina- Innermost layer of eye. Lines congest 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 pr otein disc lowlife the pupil. Focuses light rays on to the retina. aqueous wit and Vitreous humor- aqueous humor is viscose perspicuous 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. ciliated 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 known as the blur spot because it has no photoreceptors so it cant produce an image. Carries awkward 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, line of battle it on our website: OrderCust! omPaper.com
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