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STUDIES IN PHYSIOLOGY 



The Structure and Functions of the Cochlea. The most 

 complicated portion of the inner ear is now to be described. 



FIG. 145. Diagram of a Cross Section of a Coil of the Cochlea. 



AN = auditory nerve. 



CC= central compartment of cochlea filled with endolymph. 



OC= sensory cells with long projecting hairs. 



Sc.T and Sc.V= upper and lower compartments of cochlea filled with 

 perilymph. 



In general form it resembles a small spirally twisted snail 

 shell ; hence its name coch'le-a (Greek Jcochlias = a snail) (see 

 Fig. 142). Every part of this spiral cavity is divided by two 



