Lesson 7.1 Crossword
Across
2. | the continuation of the optic nerve fibers beyond the optic chiasma |
7. | the middle layer of the wall of the eye |
8. | tear secretors; located above the lateral end of each eye |
9. | transmitter of visual sensory signals to the occipital lobe of the brain |
12. | the innermost layer of the eye, containing light-sensitive nerve endings that send impulses through the optic nerves to the brain |
13. | secretors of an oily substance; located in the eyelids |
14. | the point at which the optic nerves cross |
16. | muscles attached to the outer surface of the eye that are responsible for changing the direction of viewing |
Down
1. | the structure between the choroid and the iris that anchors the lens in place |
3. | a transparent tissue over the anterior center of the eye |
4. | modified sweat glands located between the eyelashes |
5. | the tough, fibrous outer layer of the eye |
6. | sensory cells in the retina that are sensitive to bright light and provide color vision |
7. | a delicate external membrane that covers the exposed eyeball and lines the eyelid |
8. | a transparent, flexible structure that is curved outward on both sides |
10. | the opening through which light rays enter the eye |
11. | sensory cells in the retina that are activated in dim light |
15. | the anterior portion of the choroid, which gives the eye its color |