The Components of the Eye 0.0 / 5 ? Human BiologyThe Nervous SystemA2/A-levelOCR Created by: _laurenbCreated on: 29-02-16 18:18 106832145 Across 1. Contains the ciliary muscle which control the shape of the lens (3, 7, 4) 4. A bundle of nerve fibres which carry action potentials to the brain (3, 5, 5) 5. A thick, tough outer layer of the eye which maintains the shape and protects the inner components (3, 6) 6. A circular piece of tissue containing radial and circular muscles which contract and relax to change the shape of the pupil. This adjusts the amount of light that can enter the eye (3, 4) 8. Is formed of long, narrow, transparent cells which create a biconcave shape, focusing light onto the retina. (3, 4) Down 2. The 'hole' in the middle of the iris that light enters through. Its shape is adjusted by the iris (3, 5) 3. Has a high concentration of melanin and blood vessels and absorbs light rays so as to prevent reflection (7, 5) 4. Has a high concentration of cone cells, giving high visual acuity (3, 5) 6. Continues from the sclera; refracts light rays and focuses them on the retina (3, 6) 10. The inner most part of the eye, which recieves light stimuli, with the photoreceptors (ganglion, rod and cone cells) it contains then processing the information from the light (3, 6)
Comments
No comments have yet been made