DIGESTIVE TRACT 263 



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5 :3 ?r 3 (U -.n -^ -c .5= :a 



O 



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1^ 



o 



■^ 5 OOing-pO^ 3T3t^<fl a, "t3--3'^C*-S'" 



; ^?«'^=°^-= ?nS-3= l^cg-^o-B-g-B^S^ 



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rt3 o 00 ObbS.Sf 



w . ^ . 



u5 3 -; !2 oj ^ 



gi2 8 oS2§oS'-sJ2 



o 3 a e H 



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