394 FOODS CIRCULATED AND USED IX THE BODY 



p«::~:-:n :: The ivary in hor righ: ban 



:t:::: :irs:rr ::." 



Tar :iiyniMi. : li::Ie an iers: ■:•: :: s 

 :17a:::; gland, gra iaa ly adaaoroar'S a,s ' 



pr-r-'S"-: . ;1t is i.HV 



A r;.i_: ir-e: 5| 



•an be for the most pari 



tructure found near the 

 ~r grow past adolescence. 

 II seems to have some 

 influence on the sex 

 glands and on the lime 

 content of bone. 



The reproductive 

 glands. S :::::- par :•: 

 aba — and testes 



have long been known to 

 control the development 

 of the so-called secondary 

 sax enaaaca-rasnas ~aaea 

 give us the difference 

 in appearance between 

 females and males. It is 

 not too much to say that 

 h;raz::ias are responsible 

 for many sex characteris- 

 ties, as experiments with 

 fowls and other animals 

 have proved. But popu- 



k-r S^ZeZ^ZaS oz :iir -rZ-rC: 



:: glaring zazse g.iazds 

 from other animals in 

 beings are greatly 



iOOZevea. 



n for many years 





zz: 



exaggerated ai 



The pancreas and liver. I: Las beez lozo^z for : 

 -.Li.' :he pancreas produces sr caber secrezoz besides :haz wh 

 passes into the digestive tract. But investigators have now dis- 

 covered that this internal secretion, with its hormone, is produced 

 in groups of cells known as the Islands of Langerhans (lang'er-hans) 

 in the pancreas. If this hormone is not present, then sugar, which 

 normally is stored in the Kver as glycogen, is allowed to go directly 

 into the blood, where it soon appears in excessive quantities, 



