Anatomy of the Large Intestine, Dr Adel Bondok

Показать описание

Dr Adel Bondok Anatomy Teaching Videos. The video describes the anatomy of the large intestine. It covers the following objectives:
@ Parts of the large intestine
@ Length and position of each part.
@ Peritoneal covering.
@ Blood supply.
@ Nerve Supply
@ Lymph drainage
@ Radiological examination.
@ Targeted topics on each part.

DiDio and Anderson (1968) used the term ileal pylorus, which is anatomically correct, rather than the term ileocecal valve. They stated that the ileum opens into the transitional zone between the cecum and the ascending colon, thereby asserting that the name "ileocecal valve" does not have any anatomic meaning. However, for the sake of convenience, we will continue to call this anatomic entity the "ileocecal valve."
Kumar and Phillips (1987) stated that the superior and the inferior ileocecal folds are responsible for the competence of the ileocecal valve.
Bogers and Van Marck (1993) stated that "the ileocecal junction remains a controversial region of the gut." They stated in a review in 1993: "Based on the available data from the literature, evidence is accumulating for a sphincteric function."

@@ Finally, the purpose of the ileocecal valve is not definitely known. However: it has been reported that:
@ The valve plays little or no part in the prevention of reflux of cecal contents into the ileum (it was believed that it does).
@The circular muscle of the lower end of the ileum (called the ileocecal sphincter by physiologists) serves as a sphincter and controls the flow of contents from the ileum into the colon.
@ The smooth muscle tone is reflexly increased when the cecum is distended; the hormone gastrin produced by the stomach causes relaxation of the muscle tone.