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. Surgery, its principles and practice . one-fifth inch atthe middle andtip. The diam-eter affords noindex to thatof the lumen,for the wallsvary much inthickness. Theappendix issometimes,though rarely,absent (Zucker-kandl, Laffor-gue, Swan). The appen-dix is providedwith a mesen-tery of its own—the mesoap-pendix or mes-e n t e r i ol u m .This, like manyother of thefolds of theperitoneum, isdue to a liftingof a fold ofperitoneum bythe blood-ves-sels in the fetusas they coursealong. It comes off the left or lower surface of the mesentery of theileum at its termination, and, passing behind the l

. Surgery, its principles and practice . one-fifth inch atthe middle andtip. The diam-eter affords noindex to thatof the lumen,for the wallsvary much inthickness. Theappendix issometimes,though rarely,absent (Zucker-kandl, Laffor-gue, Swan). The appen-dix is providedwith a mesen-tery of its own—the mesoap-pendix or mes-e n t e r i ol u m .This, like manyother of thefolds of theperitoneum, isdue to a liftingof a fold ofperitoneum bythe blood-ves-sels in the fetusas they coursealong. It comes off the left or lower surface of the mesentery of theileum at its termination, and, passing behind the l Stock Photo
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Reading Room 2020 / Alamy Stock Photo

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2CDJKWC

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7.2 MB (400.4 KB Compressed download)

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1448 x 1726 px | 24.5 x 29.2 cm | 9.7 x 11.5 inches | 150dpi

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. Surgery, its principles and practice . one-fifth inch atthe middle andtip. The diam-eter affords noindex to thatof the lumen,for the wallsvary much inthickness. Theappendix issometimes,though rarely,absent (Zucker-kandl, Laffor-gue, Swan). The appen-dix is providedwith a mesen-tery of its own—the mesoap-pendix or mes-e n t e r i ol u m .This, like manyother of thefolds of theperitoneum, isdue to a liftingof a fold ofperitoneum bythe blood-ves-sels in the fetusas they coursealong. It comes off the left or lower surface of the mesentery of theileum at its termination, and, passing behind the latter, runs along theappendix. In the fetus it extends to the tip, as it does in over one-halfof the adult subjects; when too short it causes the appendix to becomecurled upon itself. In the fetus and young child the mesoappendix isthin and translucent; in the adult it contains much fat, especially incorpulent individuals. Between its layers are also found unstripedmuscle-fibers, the appendicular artery and its branches, with the ac-. FlG. 403.—Appendix Located on the Left Side (Gronroos). 1, Stomach; 2, first part of duodenum; 3, vertical part of duodenum(dotted); 4, beginning of jejunum; 5, end of ileum; 6, section of thecommon mesentery; 7, cecum; 8, angle fornaed by colon; 9, splenicflexure; 10, descending colon; 11, rectum; 12, spleen; 13, pancreas;14, superior mesenteric artery. TYPHLITIS, PERITYPHLITIS, EPITYPHLITIS. 731 companying veins, nerves, and lymphatics, and one or more lymph-nodes. The lumen of the appendix opens into the cecum about one inchbelow the ileocecal valve. This opening is funnel-shaped, as a rule;occasionally it is a mere slit or a circular orifice. It is sometimespartly closed by a fold of mucous membrane, discovered by Weitbrecht,but known as Gerlachs valve. It is evident that this must be rudi-mentary, or flatus or feces could not enter the appendical lumen.Moreover, it is by no means constant; for instance, Lafforgue met withit but twice in h

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