The gall bladder and the extrahepatic biliary passages in late embryonic and early fetal life
✍ Scribed by Lee, Henry ;Halpert, B�la
- Publisher
- John Wiley and Sons
- Year
- 1932
- Tongue
- English
- Weight
- 788 KB
- Volume
- 54
- Category
- Article
- ISSN
- 0003-276X
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✦ Synopsis
The early stages of the development of the biliary system have frequently been investigated, but little information is available on the human gall bladder and the biliary passages in late embryonic and early fetal life( l,2). Adequate material f o r such studies is, of course, difficult to obtain. It was our good fortune to secure some preparations suitable to furnish information on some points of particular interest regarding the structural evolution of the gall bladder and the extrahepatic biliary passages. The data obtained are presented in this preliminary report.
MATERIAL
There were at our disposal: I) Serial sections of the entire biliary system of two embryos, 25 and 40 mm. long, and, 2) serial sections of eight gall bladders of embryos and fetuses ranging from 80 t o 370 mm. in length. Most of the sections were stained with hematoxylin eosin, and some by the method of van Gieson.
A. The gall bladder
The endodermal portion of the gall bladder in both the 25-and 40-mm. embryos is represented by a single layer of columnar epithelial cells which line the lumen, the mesodermal portion comprising the rest of the wall (fig. 1).