52 FROM FISH TO PHILOSOPHER 



port mechanisms in many types of experimental animals 

 and in man, now aflFord a body of precise knowledge on 

 the kidney not matched by that available on any other 

 organ of the body. At one pole these observations are of 

 interest in relation to the regulation of renal fmiction in 

 man and the disturbances in this function caused by 

 disease; at the other pole interest is focused on the na- 

 ture of the physiological mechanisms by which renal 

 function is controlled, and on the biochemical nature of 

 the cellular mechanisms by which various tubular opera- 

 tions are carried out. 



