. The Encyclopædia britannica; a dictionary of arts, sciences, literature and general information. Fig. 5.—Intestinal Tract of CanisVttlpes. 5, cut end of duodenum; C,^caecum; R, cut end of Fig. 6.—Intestinal Tract of Macropus bennelli. S, cut end ofduodenum; R, cut end of rectum; C, caecum; Cj, accessorycaecum; , colic loop of hind-gut. proximal and distal ends of the duodenal loop, whilst its distalend passes into the hind-gut at the colic caecum or caeca. Inthe embryos of all birds and mammals, the median point ofMeckels tract, the part of the loop which has grown out farthe
. The Encyclopædia britannica; a dictionary of arts, sciences, literature and general information. Fig. 5.—Intestinal Tract of CanisVttlpes. 5, cut end of duodenum; C,^caecum; R, cut end of Fig. 6.—Intestinal Tract of Macropus bennelli. S, cut end ofduodenum; R, cut end of rectum; C, caecum; Cj, accessorycaecum; , colic loop of hind-gut. proximal and distal ends of the duodenal loop, whilst its distalend passes into the hind-gut at the colic caecum or caeca. Inthe embryos of all birds and mammals, the median point ofMeckels tract, the part of the loop which has grown out farthestfrom the dorsal edge of the mesentery, is marked by the diverti-culum caecum vitelli, the primitive connexion of the cavity of thegut with the narrowing stalk of the yolk-sac (fig. 4, y). Natur-ally, in birds where the yolk-sac is of great functional importancethis diverticulum is large, and in a majority of the families of birds persists throughout life, forming a convenient point oforientation. In mammals, no doubt in association with thefunctional reduction of the yolk-sac, this diverticulum, which isknown as Meckels diverticulum, has less importance, and whilstit has been observed in
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectencyclo, bookyear1910
