1302 



THE ORGANS OF DIGESTION 



The Ileocecal Valve (valvuli coli) (Figs. 1042 and 1043). The lower end of the 

 ileum terminates by opening into the inner and back part of the large intestine, 

 at the point of junction of the cecum with the colon. The opening is guarded 

 by a valve, consisting of two semilunar segments, an upper or colic segment (labium 

 superius) and a lower or cecal segment (labium inferius), which project into the 



EPITHELIUM 



sfgsi:- 



^^i GLAND 

 TUNICA 



---MUSCULAR LAYER 



FIG. 1040. Transverse section of the vermiform appendix of man. (Kolliker.) 



lumen of the large intestine. The upper one, nearly horizontal in direction, is 

 attached by its convex border to the point of junction of the ileum with the colon; 

 the lower segment, which is more concave and longer, is attached to the point of 

 junction of the ileum with the cecum. At each end of the aperture the two segments 



ILEOCECAL 



ANTERIOR 

 LYMPHATICS 

 OF CECUM 



NODE OF 

 APPENDIX 



FIG. 1041. Lymphatics of the cecum and appendix, anterior view. (Poirier and Charpy.) 



of the valve coalesce, and are continued as a narrow membranous ridge around 

 the canal for a short distance. Each ridge is known as the frenulum of the valve 

 (frenulum valvulae coli). The left or anterior part of the aperture is rounded; 

 the right or posterior is narrow and pointed. In the formation of the valve the 

 termination of the small intestine invaginates for a short distance into the lumen 



