114 PHYSIOLOGY FOR THE LABORATORY. 



g. The conjunctiva is a thin membrane over the cornea. 

 It is a continuation of the mucous membrane lining the 

 eyelids. In removing the eye, the conjunctiva is cut 

 through where it passes from the eyelids to the sclerotic 

 coat. 



h. The aqueous humor is found in the anterior chamber 

 of the eye by cutting through the cornea about a quarter 

 of an inch from the junction of the cornea with the 

 sclerotic coat. 



i. Find the iris. 



1. What color is it? 



2. What is its shape? 



3. Where is it attached? 



j. The pupil, or opening. 



1. How is it formed? 



2. What is its shape ? 



3. How does its shape change ? 



Jc. At a short distance posterior to the cornea, cut 

 through the sclerotic coat, being careful not to cut too 

 deeply. The pigmented membrane beneath it is the 

 choroid coat. How are the sclerotic and choroid coats 

 connected? Remove a strip of the sclerotic coat one 

 quarter of an inch broad, stretching from the cornea to 

 the optic nerve. 



1. What color is its inner surface ? 



2. The pale fibres of the ciliary muscle may be seen 



in the front part of the choroid close to the 

 cornea. Where do they arise? How far 

 backward do they extend? 



