A STUDY OF SMOOTH MUSCLE AND ELASTIC TISSUE OF EXTRAHEPATIC BILE DUCT IN MAN
- VernacularTitle:人体肝外胆管平滑肌和弹力纤维分布的观察
- Author:
Xiaoju YANG
- Publication Type:Journal Article
- Keywords:
extrahepatic bile duct;
smooth muscle;
elastic fibers
- From:
Academic Journal of Second Military Medical University
1982;0(02):-
- CountryChina
- Language:Chinese
-
Abstract:
Presence or absence of smooth muscle in extrahepatic bile duct is controversial Histological studies of extrahepatic bile ducts in 20 persons have been made. It was found that: in their walls muscular layer was present in 13 specimens, and size and shape of muscle bundles were different,, They were in irregular arrangement, and appeared to be scattered, clustered or layer upon layer. In the lower segment of the bile duct, there was a gradual increase in the amount of smooth muscles and coarsened muscle bundles. But muscular elements were not obsererved in other 7 specimens. Elastic fibers of the wall were scattered or crowded in the superficial layer of the muco-derm. There was no relationship between the type of elastic fibers and the structure of the ducts. We believe that there was sufficient smooth muscle in the walls of common bile duct which can produce peristalsis. In the absence of smooth muscle, how to explain their motility is still worthy of further studying.
