The dissector's manual of practical and surgical anatomy / By Erasmus Wilson.

  • Wilson, Erasmus, Sir, 1809-1884.
Date:
1856
Catalogue details

Licence: Public Domain Mark

Credit: The dissector's manual of practical and surgical anatomy / By Erasmus Wilson. Source: Wellcome Collection.

Provider: This material has been provided by the Harvey Cushing/John Hay Whitney Medical Library at Yale University, through the Medical Heritage Library. The original may be consulted at the Harvey Cushing/John Hay Whitney Medical Library at Yale University.

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    pancreas and transverse duodennm, and descends within the layers of tlie mesentery, to tlie ri<^ht iliac fossa, where it ternii- nates, very much diminished in size. It forms a curve in its course, the convexity being directed towards the left, and the concavity to the right. It is in relation near its commencement with the portal vein ; and is accompanied by two veins, and the superior mesenteric plexus of nerves. The branches of the superior mesenteric artery are— Yasa intestiui tenuis, Colica dextra, Ileo-colica, Colica media. The vasa intestini tenuis arise from the convexity of the supe- rior mesenteric artery. They vary from fifteen to twenty ia number, and are distributed to the small intestine, from the duo- denum to the termination of the ileum. In their course between the layers of the mesentery, they form a series of arches by the inosculation of their larger branches; from these are developed secondary arches, and from the latter a third series of arches, from which the branches arise which are distributed to the coats of the intestine. From the middle branches a fourth, and some- times even a fifth series of arches is produced. By means of these arches a direct communication is established between all the branches given off from the convexity of the superior mesen- teric artery; a superior branch {inferiorpancreatico-duodenaUs) supplies the pancreas and duodenum, and inosculates with the pancreatico-duodenalis, and the inferior unites with the ileo- colica. The ileO'CoUc artery is the last branch given off from the con- cavity of the superior mesenteric. It descends to the right iliac fossa, and divides into branches which communicate and form arches, from which branches are distributed to the termination of the ileum, the ca3cum, and the commencement of the colon. This artery inosculates on the one hand with the termination of the mesenteric trunk, and on the other with the colica dextra. The colica dextra arises from about the middle of the con- cavity of the superior mesenteric, and passing outwards behind the ])eritoneum, divides into branches which form arches, and are distributed to the ascending colon. Its descending branches inosculate with the ileo-colica, and the ascending with the colica media. The colica media arises from the upper part of the concavity of the su})crior mesenteric, and passes forward between the layers of the transverse mesocolon, whore it forms arches, and is distri- buted to the transverse colon. It inosculates on the right with the colica dextra; and on the left with the colica sinistra, a branch of the inferior mesenteric artery.