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22 Cards in this Set
- Front
- Back
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the large intestine is made up of
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Cecum + Colon + Rectum + Anus
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how long is the large intestine and what is it lined with
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4-5ft and mucosa
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simple columnar epithelial, with no vill, secretory cells, nor enzymes that lines the large intestine
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mucosa
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the three regions of the large intestine are
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cecum, colon, and rectum/anus
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blind pouch at peroximal end with vermiform appendix
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cecum
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the 4 sections of the colon
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ascending, transverse, descending, and sigmoid colon
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part of the colon that begins at ileocecal valve and ends at hepatic flexure
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ascending colon
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part of the colon that begins at the hepatic flexure and ends at the splenic flexure
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transverse colon
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part of the colon that begins at the splenic flexure at ends at the sigmoid colon
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descending colon
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s-shaped terminal curve going to rectum
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sigmoid colon
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1-2inch stratified squamous epithelial-lined smooth muscular tube
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rectum
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internal and external sphincter muscles
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anus
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the ileum meets the cecum where
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the iliocecal valve
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what does the large intestine do
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it helps absorb electrolytes and water by active transport and osmosis,fecal storage, until defacation reflex, vitamin k and b synthesis by friendly flora
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strong, cyclic, peristaltic mass movements via spinal reflexes soon after meals
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defecation reflux
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the defecation cycle is
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1-3 days
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feces is what percent water and what percent solid
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75% and 25%
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the solids in feces consists of what
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large amounts of undigested dietary fiber, bacteria, and undigested fats, and smaller amounts of epithelial cells, salts, mucus and other digestive secretions
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the percentage of undigested fat in the feces is
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about 10-20%
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where does the undigested fat come from
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bacterial and epithelial cells
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the amount of undigested dietary fiber in feces
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about 30%
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how much bacteria is in feces
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about 30%
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