. Human physiology. ck part ofthe caecum. This appendage has all the characters of an hypotheses have been indulged regarding its uses. Some haveconceived it to be a reservoir for the faeces; but its diminutive size, inthe human subject, precludes this idea: others have thought, that itsecretes a ferment, necessary for fascal formation; and others, again, amucus for preventing the induration, that might result from the deten-tion of the fieces in the caecum. The opinion—that it is a mere vestigeof the useful and double casca, which exist in certain animals—is asphilosophical
. Human physiology. ck part ofthe caecum. This appendage has all the characters of an hypotheses have been indulged regarding its uses. Some haveconceived it to be a reservoir for the faeces; but its diminutive size, inthe human subject, precludes this idea: others have thought, that itsecretes a ferment, necessary for fascal formation; and others, again, amucus for preventing the induration, that might result from the deten-tion of the fieces in the caecum. The opinion—that it is a mere vestigeof the useful and double casca, which exist in certain animals—is asphilosophical as any. M, de Blainville, indeed, regards it as the trueCEecum; and what is named the ctecum as the commencement of thecolon. It is manifestly of little importance, as it has been foundwanting or obliterated in many subjects, and has been extirpated re-peatedly with impunity. The cascum is said to be wanting in all ani- De rOrganisation des Animaux, &c., Paris, 1S25. DIGESTIVE ORGANS — LARGE INTESTINE. 101. Muscular Coat of the Colon, as seen after the removalof the Peritoneum. 1, 1. fill res. One of its three bands of longitudinal muscular2, 2. Circular fibres of the muscular coat. mals that hybernate. It is small in the Carnivora; very large andlong in the Solidungula, Euminantia and Kodentia; in which,—as willbe seen hereafter,—there is reason to believe, that digestion of the ali-ment, which has escaped change higher up, occurs. The colon is by much the longest of the large intestines, (Fig. 2.)It is a continuation of the cascum, from which it cannot be distin-guished ; but is considered tocommence at the terminationof the ileum. From the rightiliac fossa it ascends along theright lumbar region, over thekidney, to which it is con-nected. It is, in this part,called colon dextrum^ ascendingor right lumbar colon. Fromthe kidney it passes forwardsand crosses the abdomen inthe epigastric and hypochon-driac reo-ions, beinoj connectedto the duodenum. This por-tion is cal
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