FIG. 98. HUMAN STOMACH. 



ce., oesophagus ; py., pylorus ; c'.c"., constrictions 



of the pyloric chamber. 



166 THE STRUCTURE OF MAN 



lower part of the small intestine. 1 This diverticulum is connected 

 during the embryonic period, and sometimes still longer, with the 

 navel, by a cord, containing the last vestiges of the ductus 

 omphalo-mesentericus, which connected the yolk-sac with the 



intestine. We have in this 

 a mere vestige of a foetal , 

 organ. 



[On examination of 

 769 bodies, at the insti- 

 gation of the Collective 

 Investigation Committee of 

 the Anatomical Society of 

 Great Britain and Ireland, 2 

 the diverticulum ilei has 

 been encountered in but 

 sixteen cases, or in little 

 more than 2 per cent. 

 Special interest attaches to 

 Eolleston's report upon 



the examination of 337 individuals (nearly 44 per cent of 

 the whole number) which were equally representative of the 

 two sexes, as nine of the ten possessed of the diverticulum 

 were ma^s.] 



[A remarkable case has more recently been put on record by 

 Buchanan, 3 of an adult male subject in whom this appendage had 

 a total length of 9 cm. and a basal circumference of 11 cm., 

 and contained a spacious central cavity having a wide aperture of 

 communication with the ileum. The remaining alimentary 

 viscera were strikingly aberrant, the colic head and the coecum 

 being directed towards the left hypogastric region (instead of the 

 right), the ccecum terminating in an appendix vermiformis which 

 measured 13 J cm. in length.] 



1 According to Sappey, the length of the intestine in white men of middle height 

 is 9600 mm., 8000 of which are to be reckoned to the small intestine, and 1600 to 

 the large one. According to the researches of Chudzinski, who examined nine 

 Negroes, the total average length was 8667 mm., i.e. almost 1000 less. There were, 

 however, great variations in length in different individuals. If the length of the 

 intestine is affected by the height of the individual, it can hardly be so to any great 

 extent. 9 



The fact that the total length of the intestine is less in Negroes is due to the 

 comparative shortness of the small intestine, for the large intestine is longer in the 

 black than in the white races. 



2 [Jour. Anat. and Phys., vol. xxvi. p. 91.] 

 :i [Ibid. vol. xxvii. p. 559.] 



