The macromorphology of the colon and rectum were carried out on 15 dogs, 15 goats and 15 donkeys of both sexes and different ages. This study revealed that the length of the large intestine was about 36.3 to 59.2 cm, 284.0 to 412.0 cm and 510.0 to 577.0 cm in the dog, goat and donkey, respectively. It formed 0.73, 3.95 and 3.75 times the length of the body in the before mentioned animals, respectively. The ascending colon constituted about 6.7% in the dog, 74.2% in the goat and 45.6% in the donkey, whereas the transverse colon formed about 15%, 2.67% and 2.3% in the same animals, respectively. The descending colon of the donkey formed about 29.8% of the total length of the large intestine, whereas in the dog and goat it constituted about 25.9% and 11.3%, respectively. The mucosal surface of the colon showed intermingled small and large longitudinal folds in the dog. In the goat, the longitudinal folds were either ill-developed at the ascending or well-developed at the transverse and descending colon. In the donkey, the mucosal surface was characterized by the presence of transverse folds in the transverse colon and semilunar folds in the descending colon. The rectum and anal canal comprised about 27%, 5.7% and 5.9% in the dog, goat and donkey, respectively. In the dog, the luminal surface of the empty rectum showed longitudinal folds at its cranial part and transverse ones at the rectal ampulla, in addition to numerous mucosal pits. While, the rectal mucosa of the goat and donkey, demonstrated longitudinal folds in addition to the Columnae rectales at its caudal part in the former animal. In distension the rectal mucosa showed impressions of fecal pellets (goat) or fecal balls (donkey), which were delineated by transverse folds. The end form of the fecal matter (column in dog and balls in donkey) was formed in the descending colon. However, in the goat, the pellets appeared at the beginning of the centrifugal gyri of the ascending colon.
Badawi, H., A. Abd-Elrahman, Y., Salem, A., & Mohamed, A. (1999). MORPHOLOGICAL STUDIES ON THE COLON AND RECTUM OF SOME DOMESTIC ANIMALS WITH SPECIAL REFERENCE TO THE END FORM OF THE FECAL MATTER. Assiut Veterinary Medical Journal, 40.2(80), 32-55. doi: 10.21608/avmj.1999.182323
MLA
H. Badawi; Yousria A. Abd-Elrahman; A.O, Salem; A.M. Mohamed. "MORPHOLOGICAL STUDIES ON THE COLON AND RECTUM OF SOME DOMESTIC ANIMALS WITH SPECIAL REFERENCE TO THE END FORM OF THE FECAL MATTER". Assiut Veterinary Medical Journal, 40.2, 80, 1999, 32-55. doi: 10.21608/avmj.1999.182323
HARVARD
Badawi, H., A. Abd-Elrahman, Y., Salem, A., Mohamed, A. (1999). 'MORPHOLOGICAL STUDIES ON THE COLON AND RECTUM OF SOME DOMESTIC ANIMALS WITH SPECIAL REFERENCE TO THE END FORM OF THE FECAL MATTER', Assiut Veterinary Medical Journal, 40.2(80), pp. 32-55. doi: 10.21608/avmj.1999.182323
VANCOUVER
Badawi, H., A. Abd-Elrahman, Y., Salem, A., Mohamed, A. MORPHOLOGICAL STUDIES ON THE COLON AND RECTUM OF SOME DOMESTIC ANIMALS WITH SPECIAL REFERENCE TO THE END FORM OF THE FECAL MATTER. Assiut Veterinary Medical Journal, 1999; 40.2(80): 32-55. doi: 10.21608/avmj.1999.182323
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