Term
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Definition
begins at the pyloric valve, arcs around the head of the pancreas & passes to the left, and ends at a sharp bend
first 25 cm of the small intenstine |
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Term
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Definition
a sharp bend in the small intestine that ends the duodenum
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Term
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Definition
first 40% of the small intestine beyond the duodenum
early anatomists found it be empty
begins in upper left quadrant of the abdomen but lies mostly within the umbilical region
rich blood supply
most digestion & nutrient absorption occurs here |
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Term
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Definition
the last 60% of the postduodenal small intestine
mainly hypogastric region & part of pelvic cavity
thinner, less muscular, less vascular than jejunum
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Term
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Definition
a capillary network
absorb most nutrients |
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Term
Intestinal Crypts
(crypts of Lieberkuhn) |
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Definition
numerous pores that open into tubular glands on the floor of the small intestine
in upper half they consist of enterocytes & goblet cells
in lower half they consist of stem cells
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Term
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Definition
the end of the small intestine
where the ileum joins the ceum of the large intestine |
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Term
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Definition
| a spinchter which protrudes into the cecum and regulates the passage of food residue into the large intestine |
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Term
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Definition
largest folds of the intestinal wall
transverse to spiral ridges up to 10 mm high
not visible on external surface
cause the chyme to flow on a spiral path along the intestine
slows its progress, causes more contact with the muscosa & promotes more thorough mixing & nutrient absorption |
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Term
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Definition
projections in the mucosa with tongue to fingerlike shapes
largest in the duodenum & become progressively smaller in more distal regions of small intestine |
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Term
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Definition
a lymphatic capillary in the areolar tissue of the villus
absorbs most of the nutrients
give contents a milky appearance |
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Term
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Definition
| anchors the transverse and sigmoid colon to the posterior abdominal wall |
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Term
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Definition
a blind pouch in the lower right abdominal quadrant inferior to the ileocecal valve
beginning of the large intestine |
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Term
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Definition
a blind tube 2 to 7 cm long attached to the lower end of the cecum
densely populated with lymphocytes
significant source of immune cells |
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Term
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Definition
| begins at the ileocecal valve & passes up the right side of the abdominal cavity |
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Term
Hepatic (right colic)
Flexure |
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Definition
| a 90 turn near the right lobe of the liver that converts into the transverse colon |
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Term
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Definition
| passes horizontally across the upper abdominal cavity & turns 90 downward at the left colic (splenic) flexre |
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Term
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Definition
"s-shaped" portion of the colon
examined with a sigmoidoscope |
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Term
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Definition
continuation of the large intestine
15 cm long
not quite straight but has 3 lateral curves as well as an anteroposterior curve
has 3 infoldings which enable it to retain feces while passing gas |
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Term
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Definition
final 3cm of the large intestine
passes through the levator ani muscle of the pelvic floor & terminates at the anus |
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Term
Internal & External
Anal Sphincters |
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Definition
sphincters that regulate the anus
composed of smooth muscle of the muscularis externa and skeletal muscle of th pelvic diaphgram |
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Term
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Definition
| longitudinal ridges formed by the mucosa that have depressions in them called anal sinuses |
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