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Anatomy photo:37:12-0102 at the SUNY Downstate Medical Center—"Abdominal Cavity: The Cecum and the Vermiform Appendix" "The vestigiality of the human vermiform appendix: A Modern Reappraisal"—evolutionary biology argument that the appendix is vestigial; Smith HF, Fisher RE, Everett ML, Thomas AD, Bollinger RR, Parker W (October 2009).
The mucosa-associated lymphoid tissue (MALT), also called mucosa-associated lymphatic tissue, is a diffuse system of small concentrations of lymphoid tissue found in various submucosal membrane sites of the body, such as the gastrointestinal tract, nasopharynx, thyroid, breast, lung, salivary glands, eye, and skin.
Inflamed appendix removal by open surgery Laparoscopic appendectomy. Laparoscopic view of a phlegmonous cecal appendix with fibrinous plaques, located in the right iliac fossa. The surgical procedure for the removal of the appendix is called an appendectomy. Appendectomy can be performed through open or laparoscopic surgery.
The gut-associated lymphoid tissue lies throughout the intestine, covering an area of approximately 260–300 m 2. [5] In order to increase the surface area for absorption, the intestinal mucosa is made up of finger-like projections (), covered by a monolayer of epithelial cells, which separates the GALT from the lumen intestine and its contents.
Infection of the appendix is appendicitis. When there is a buildup of bacteria, the appendix can get inflamed and swollen, and this leads to appendicitis. Pancreatitis is the inflammation of the pancreas. Acute pancreatitis is sudden inflammation of the pancreas that may be mild or life-threatening but usually subsides. Gallstones and excessive ...
Ileum, caecum and colon of rabbit, showing Appendix vermiformis on fully functional caecum The human vermiform appendix on the vestigial caecum. The appendix was once believed to be a vestige of a redundant organ that in ancestral species had digestive functions, much as it still does in extant species in which intestinal flora hydrolyze cellulose and similar indigestible plant materials. [10]
[1] [2] It descends behind the termination of the ileum and enters the mesoappendix of the vermiform appendix. It runs near the free margin of the mesoappendix and ends in branches which supply the appendix. Micrograph of entry point of appendicular arteries (arrows at level of inner muscular layer), not to be confused with a perforation.
The bands converge at the root of the vermiform appendix. At the rectosigmoid junction, the taeniae spread out and unite to form the longitudinal muscle layer. In the caecum, the ascending colon, the descending colon and sigmoid colon the positions of these bands are fixed.