. Anatomischer Anzeiger. Anatomy, Comparative; Anatomy, Comparative. 210 becoming gradually less and less marked, finally disappear. This arrangement is bilateral. The fibres marked IR represent some bundles of muscle which (shown in Fig, 14 IE) form an independent ring of muscle around the common bile-duct, between it and the duct of WnisuNG. /./ Fig. 12. Macerated duodenal portion of the common bile-duct of man. The relation of the com- mon bile-duct and the duct of WiRSüNG to the longitudinal muscular coat of the intestine is shown. X5. At U are seen muscle fibres, which run almost entirely
. Anatomischer Anzeiger. Anatomy, Comparative; Anatomy, Comparative. 210 becoming gradually less and less marked, finally disappear. This arrangement is bilateral. The fibres marked IR represent some bundles of muscle which (shown in Fig, 14 IE) form an independent ring of muscle around the common bile-duct, between it and the duct of WnisuNG. /./ Fig. 12. Macerated duodenal portion of the common bile-duct of man. The relation of the com- mon bile-duct and the duct of WiRSüNG to the longitudinal muscular coat of the intestine is shown. X5. At U are seen muscle fibres, which run almost entirely around the duct of WiRSUNG, but as these fibres approach that side of the pancreatic duct nearest the common bile-duct, they turn abruptly and run up on the duct of Wirsung in a longitudinal direction. They gradually diminish in volume as they ascend the duct. This structure is bilateral. See also Fig. 14 H. Fig. 13 represents the structures seen upon removal of the mucous membrane from the intestinal wall in the region of the duodenal papilla. The inner circular muscular coat of the intestine is re- presented by CI. The first point to demand attention is the penetration of the inner circular muscular coat by the common bile-duct. At the spot of penetration, there is a simple se- paration of the muscle bundles of the inner circular muscle coat. It should be noted that the human specimen differs from the ar- rangement found in dog. It will be re- membered that in the latter animal, the inner Fig. 13. Macerated duodenal portion of the common bile-duct of man. The mucous membrane, muscularis mucosa and submucosa of the intestine have been removed. ^ Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Anatomische Gesellschaft. Jena : G. Fischer
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