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Digestive System (Small Intestine (its main function is the absorption of…
Digestive System
Small Intestine
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circular folds also increase the surface area, but also slows the movement of chyme.
has duodenal glands that secrete alkaline mucus which neutralizes the acid in the chyme; also provides protection.
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Mesentery
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Its function is to hold the organs in place, store fat, and is the location of blood vessels/nerves.
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the lesser omentum goes from the lesser curvature to the liver, and holds everything together.
the greater omentum drapes over the sm and lg intestine, is a double double layer of peritoneum, can migrate and inflame organs or part of an organ, its function is to hold the organs in place, store fat, and location of blood vessels and nerves.
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Large Intestine
the ileocecal valve is on the cecum, and its function is to keep the contents of the large Int from backing out into the Sm. Int.
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has haustra, also known as pouches or sacs.
has epiploic appendages, which are little pieces of fat with an unknown function.
Stomach
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parietal cells make HCL, that secrete Gastric Intrinsic factor that is needed for absorption of vitamin B12, which is needed for red blood cell production.
chief cells secrete pepsinogen in the presence of acid, becomes pepsin which is an enzyme that breaks down proteins.
Rectum
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the anal canal is the location of internal (smooth muscle) and external (skeletal muscle) sphincters
Sphincters
Cardiac Sphincter
keeps the contents of stomach in the stomach, and not going back into the esophagus
when this sphincter isn't working properly, acid reflux occurs.
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Peristalsis
once you swallow, this is a wave of contraction that keeps things moving from the Esophagus to the Anus.
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