216 



GROWTH OF PARTS AND ORGANS 



The weight of the pancreas on body weight — Hatai, '18. Technic : 



The pancreas is rather difficult to isolate from the surrounding 

 structures such as omentum, lymphatic nodules, fat, etc. It is advisable 

 to work first on young rats of about twenty-five days of age. In this 

 state immediately after death the pancreas can be easily distinguished 

 from the surrounding structures by its characteristic pinldsh gray color. 

 My own method is to cut the pancreas together with omentum from 

 the line of attachment along the stomach and intestine. The adipose 

 tissue can then be easily torn off by gentle pulling from the more solid 

 pancreatic tissue. The omentum and l3miphatic nodules may be 

 removed by means of sharp scissors. In the adult rat the pancreas 

 looks gray or grayish pink immediately after death. Some practice with 

 younger rats is advisable before removing the pancreas from the older 

 animals. 



2.0 



1.6 



\1 



50 



100 



150 



200 



250 300 350 400 450 



Chart 40 Showing the weight of the pancreas of the albino rat according to 

 body weight. The observed weights are represented by 152 male rats and 107 

 female rats entered according to the groups given in table 147 and formulas (25) 

 and (25 a). 



Observed weight, male. 

 — Calculated weight, male. 



° Observed weight, female. 

 Calculated weight, females. 



