GROWTH OF THE INNER EAR OF ALBINO RAT 



95 



In table 67 are given the values for the volume of the cell 

 bodies in the (1) inner and (3) outer hair cells separately and 

 the weighted volume of both cells (in the radial section of the 

 rat cochlea we see one row of inner and three rows of outer 

 hair cells), according to age. 



TABLE 67 



Average volumes of the inner and outer hair cells in cubic micro 

 (charts 33 to 37) 



At first we shall consider the weighted volume for the cell 

 bodies of the inner and outer hair cells combined (chart 33). 

 As table 67 shows, the volume increases continuously to the full 

 size at twenty days. From one to twelve days the increase is 

 rapid, and after that the volumes are about the same, though 

 somewhat fluctuating. The ratios show this relation clearly. 



