Question

READ THE DIAGRAM Eyeball Directions: Referring to the diagram, fill in the spaces with the correct numbers. Some numbers may be used move than once. See text, pp. 243-246. 1. ___ Anterior extension of the sclera; avascular structure that allows light to enter the eye 2. _ Outermost layer or tunic of the eyeball; composed of thick, fibrous connective tissue 3. _ Called the window of the eye because it is the first structure through which light en- ters the eye 4. _ Colored portion of the eye (e.g., brown eyes, blue eyes); composed of muscles that determine the size of the pupil 5. _ Middle tunic; has a rich supply of blood and nourishes the retina 6. _ The shape of this structure changes in re- sponse to the contraction and relaxation of the ciliary muscles; it refracts light waves. 7. _ Venous sinus that drains aqueous humor 8. _ Contact lenses are placed on this surface. 9. _ Layer that extends anteriorly to form the ciliary body and the iris 10. _ Innermost tunic of the posterior eye- ball; the nervous tissue that contains the photoreceptors 11. _ Optic nerve 12. _ Clouding of this structure causes cataracts. 13. _ The circular opening in the center of the iris 14. _ The blind spot 15. _ Gel-like substance that fills the posterior cavity 16. _ Ciliary muscles attach to these bands of connective tissue that pull on the lens. 17. _____ Structure that secretes aqueous humor and gives rise to intrinsic eye muscles called ciliary muscles

READ THE DIAGRAM
Eyeball
Directions: Referring to the diagram, fill in the spaces with the correct numbers. Some numbers may be used move
than once. See text, pp. 243-246.
1. _______ Anterior extension of the sclera; avascular
structure that allows light to enter the eye
2. _______ Outermost layer or tunic of the eyeball;
composed of thick, fibrous connective tissue
3. _______ Called the window of the eye because it is
the first structure through which light en-
ters the eye
4. _______ Colored portion of the eye (e.g., brown
eyes, blue eyes); composed of muscles
that determine the size of the pupil
5. _______ Middle tunic; has a rich supply of blood
and nourishes the retina
6. _______ The shape of this structure changes in re-
sponse to the contraction and relaxation of
the ciliary muscles; it refracts light waves.
7. _______ Venous sinus that drains aqueous humor
8. _______ Contact lenses are placed on this surface.
9. _______ Layer that extends anteriorly to form the
ciliary body and the iris
10. _______ Innermost tunic of the posterior eye-
ball; the nervous tissue that contains the
photoreceptors
11. _______ Optic nerve
12. _______ Clouding of this structure causes cataracts.
13. _______ The circular opening in the center of the iris
14. _______ The blind spot
15. _______ Gel-like substance that fills the posterior
cavity
16. _______ Ciliary muscles attach to these bands of
connective tissue that pull on the lens.
17. _______ Structure that secretes aqueous humor and
gives rise to intrinsic eye muscles called
ciliary muscles

$READ THE DIAGRAM Eyeball Directions: Referring to the diagram, fill in the spaces with the correct numbers. Some numbers may be used move than once. See text, pp. 243-246. 1. Anterior extension of the sclera; avascular structure that allows light to enter the eye 2. Outermost layer or tunic of the eyeball; composed of thick, fibrous connective tissue 3. Called the window of the eye because it is the first structure through which light en- ters the eye 4. Colored portion of the eye (e.g., brown eyes, blue eyes); composed of muscles that determine the size of the pupil 5. Middle tunic; has a rich supply of blood and nourishes the retina 6. The shape of this structure changes in re- sponse to the contraction and relaxation of the ciliary muscles; it refracts light waves. 7. Venous sinus that drains aqueous humor 8. Contact lenses are placed on this surface. 9. Layer that extends anteriorly to form the ciliary body and the iris 10. Innermost tunic of the posterior eye- ball; the nervous tissue that contains the photoreceptors 11. Optic nerve 12. Clouding of this structure causes cataracts. 13. The circular opening in the center of the iris 14. The blind spot 15. Gel-like substance that fills the posterior cavity 16. Ciliary muscles attach to these bands of connective tissue that pull on the lens. 17. Structure that secretes aqueous humor and gives rise to intrinsic eye muscles called ciliary muscles$

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