Comparison of anatomic and histologic differences of the intestinal bile duct among five animals

doi:10.16098/j.issn.0529-1356.2015.02.017

Abstract

Abstract:

Objective To study anatomical and histological structure differences of the intestinal bile duct among guinea pig, rabbit, canine, feline and yak. Methods The instestinal bile ducts from five kinds of animals (5 amimals each) were studied by the gross anatomy and paraffin section. HE and AB-PAS staining were performed to observe and measure the anatomical and histological structural characteristics. Results The intestinal bile ducts were formed by the bile duct in guinea pig, rabbit and yak, and by the bile duct and pancreatic duct in canine and feline. The Vater ampulla was found in guinea pig, rabbit, feline and yak, but not in canine.The Vater ampulla was formed by the bile duct enlarging in guinea pig , rabbit and yak. The bile duct structure mucous layer was thickened, had a significant increase in the gland and formed a large number of mucosal flap. The musclular layer shranked gradually. Only felines had the sphincter of Qddi and formed ampulla valvular. The property of the intestinal bile duct gland was different. The intestinal bile duct gland was the serous gland in guinea pig, canine and feline, the mucous gland in rabbit and the glands in yak. Rabbit bile duct opening was located in the gastric pyloric part, and the opening of the other animals was in the duodenum. In guinea pig, the shape of large papilla was semicircular, in rabbit and canine was oblate ellipsoid, in feline and yak was long spindle. Conclusion The most important morphological structure distinctions of the intestinal bile duct among 5 kinds of the animals were different in the formation of intestinal bile duct, Vater ampulla, the property of intestinal bile duct gland, and the shape and position of large papilla.

Key words: Gall bladder, Intestinal bile duct, Anatomical structure, Histological structure, Difference, AB-PAS staining, Mammal

ZHAI Yu-jia CUI Yan*. Comparison of anatomic and histologic differences of the intestinal bile duct among five animals[J]. AAS, 2015, 46(2): 244-250.

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