pin UO1 KH OF I'i'.i S'l ION \\i> si nil i ION 



1 1, 1 I XVI I .IrintMl:;! I'M If. I 1 1 H I .o I; i led loops ()f I he Mliall III I e -line Mild 



:il :.o lor parts of (lie laryv mfesl inc. It is, in>ivo\ er, home out. by 

 lli- medical practice of ".mil", eiiemala nilo the rectum when (lie 

 conditions ;irr .Mich that the patient c:in nol he fed in (lie normal 

 \\;i\. I'liMl :il..-;orp(iii :iml illlll alion .'!' (lie prolein (:ikc place 

 under Midi conditions is shown nol onlv h\ llic improved niih-ihvc 

 condition of (he mdmdnal. hnl also hv llic increased output of 

 nitrogen in the mine This phenomenon t.eenrs m purls of I he 

 inle .1 in: 1 1 canal in \\ liieli normally no proteoh he en \ nies occur, so 

 lh:tl I he whole |roee,^s inns! he ivlenv.l |o ;m :ie| i\ i| \ ,.f i 

 composing 1 1\0 walls of Ihe inleslme. Tlu^re Seems :il pn-vnl lil 

 ..! MUM 1:. !oi .1 .Mi !.i. I ..i \ e\|>l;in:ilion d' 1 he :tl .soi'pl ion o|' proteins, 

 \\ilh or \\ilhonl (h:M--lion, l>v ;i dnvcl ;i pplie;i I ion of 1 he Knouii 

 l:i\\.-. i! OMIIOM,. diltn ion, :md mil ulul ion I '.\;imm;it ion of Ihe 

 conlenls of Ihe smnll mleslme :il its jnnehon \\ilh I he l:iri';t' shows 

 lh:it under norm:d conditions ItlOSt of the protein h;is hern ah- 

 sorhed luM'ore re:ichin!', this point. The process is cont inned intho 

 llirtfO intestine. modit'uMl some\\h:it h\ h:icteri:il .-iction, ;uul ihe 

 .Minount th:il liiKilly (>sc:ipes ;ihsoi-pl irn cin.l :ip|>\-irs in tlu> l\>ces 

 \.MIC--. m |HM-fec(l\ normnl iiulix idiuils. \\ilh the chnnicter of (he 

 pnttein c;ilen. \ccordm; 1 ; to Mnnk,^ the easily digest il>le :inini:il 

 loods snch ns milk, e!\:\s. ;md meal are ahsorhed lo ihe extent of 

 >V to '.)'.) p(>r cent .\\lule \\ilh \e!-.e(:hle foods the ut ili/.at ion is less 

 complete; from 17 to ,'U) per cent, of (he protein may he lost in (he 

 fcccs if (he ve^etahle food is m such form a.s im( to he attacked readily 

 h\ the di:',es|i\e secret iins. 



Digestion and Absorption in the Large Intestine. Observa- 



tions upon the secretions of the lar^e intestine have hecn made upon 

 human hcm ; > m ca^es of anus prctcrnaturalis. in which the lower 

 portion of the intestine was practically isolated, and also upon 

 lower animals, in which an artificial anus was estahlished at the 

 end of the small intestine. These observations all indicate that 

 the secretion of the laiyv intestine, while it contains much mucus 

 and shows an alkaline reaction, is not character!. vd hy the presence 

 of distinctive en. 'vines. When the contents of the small intestine 

 pass the val\e they si ill contain a certain amount of unahsorhed 

 food material. As was stated in (he chapter on the movements of the 

 intestine, this material remains a lonj; time in the lar^e intestine, and 

 since it contains the digestive en -\ mes received in the duodenum the 

 digestive and absorptive- processes no doubt continue as in the small 

 intestine. Hu's general fact is well illustrated in experiments made 

 U{xm ilo^s most of whose small intestine (70 to S." per cent. "i had been 

 removed/)" These animals ctnild ili^est and absorb well, and formed 



,- Miuik. ' rjxi'lmisso dor Tliysie': ', i, part i. l^O'J. an iclo. 



wrption/ 1 ter littM-.-Uuro anil disoussiot\. 

 t 1 'danger aiul Moxxlou. " \uuM-u-au Journal of Physiology." o. 1. 100'J. 



