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Lecture 32
Digestive System II
49
Agriculture
Undergraduate 2
12/06/2010

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Term
peritoneum
Definition
serous membrane
Term
parietal peritoneum
Definition
lines body cavity
Term
visceral peritoneum
Definition
covers organs
Term
special peritoneal membranes
Definition
-greater omentum
-lesser omentum
-falciform ligament
-mesentary
-mesocolon
Term
greater omentum
Definition
suspended from inferior curvature of stomach
Term
lesser omentum
Definition
attaches lesser curvature of stomach to liver
Term
falciform ligament
Definition
attaches liver to inferior side of diaphragm and anterior body wall
Term
mesentary
Definition
attaches small intestine to posterior abdominal wall
Term
mesocolon
Definition
attaches large intestine to posterior abdominal wall
Term
retroperitoneal
Definition
-not completely covered with peritoneum
-pancreas, kidney, portion of duodenum, ascending/descending colon
Term
stomach location
Definition
-between esophagus and small intestine
-ULQ
Term
stomach regions
Definition
-cardiac
-fundus
-body
-pylorus
Term
stomach layers of smooth muscle
Definition
circular, longitudinal, oblique
Term
specializations of the inner wall of stomach
Definition
-rugae
-gastric glands
-pyloric sphincter
Term
rugae
Definition
-folds of mucosal layer
-permit stomach to distend
-increase SA for secretion/digestion
Term
gastric glands
Definition
-chief cells
-parietal cells
-mucous(goblet) cells
-enteroendocrine cells
Term
chief cells
Definition
-produce pepsinogen which is converted to pepsin for protein digestion
Term
parietal cells
Definition
produce HCl and intrinsic factor for B12 absorption
Term
mucous cells (goblet)
Definition
secrete protective mucous
Term
enteroendocrine cells
Definition
secrete hormones which influence digestive organs (gastrin)
Term
pyloric sphincter
Definition
regulates what comes from stomach into duodenum
Term
functions of stomach
Definition
-mechanical mixing of food and production of chyme
-initiates protein digestion
-storage of chyme until it passes to duodenum
-minimal absorption (some drugs, alcohol)
Term
small intestine location
Definition
-extends from pyloric sphincter (URQ) to large intestine
-occupies central and lower portion of abdominal cavity
Term
duodenum
Definition
-c-shaped first 10 in
-retroperitoneal
-duodenal papilla
-Brunner's gland
Term
duodenal papilla
Definition
opening through which bile and pancreatic enzymes enter duodenum
Term
Brunner's gland
Definition
secretes alkaline mucous
Term
jejunum
Definition
middle, slightly larger lumen
Term
ileum
Definition
-contains Peyer's patches (clusters of lymph)
Term
functions of small intestine
Definition
-major site of chemical digestion
-mechanical mixing
-major site of absorption of nutrients
-propels undigested nutrients or materials to large intestine
Term
structural specialization of intestinal wall
Definition
-plicae circulares
-villi
-intestinal glands
Term
plicae circulares
Definition
deep folds of mucosa
Term
villi
Definition
fingerlike projections increase SA contain capillary network and a lacteal to transport nutrients
Term
microvilli
Definition
columnar cells
Term
intestinal glands (crypts of Lieberkuhn)
Definition
secrete enzymes
Term
large intestine location
Definition
-start in LRQ
-extends superior to liver
-passes left to spleen
-descends left of pelvis
-terminates at anus
Term
regions of large intestine
Definition
-cecum
-ascending colon
-transverse colon
-descending colon
-sigmoid colon
-rectum
-anal canal
Term
cecum
Definition
-dilated pouch at junction of small and large intestines
Term
sigmoid colon
Definition
-s-shaped from left side to center of body
Term
internal anal sphincter
Definition
smooth muscle
Term
external anal sphincter
Definition
skeletal muscle
Term
hepatic flexure
Definition
right colic flexure
Term
splenic flexure
Definition
left colic flexure
Term
structural specialization of large intestine
Definition
-taeniae coli
-haustra
-epiploic appendages
Term
taeniae coli
Definition
-3 bands of smooth muscle
Term
haustra
Definition
sac like regions
Term
epiploic appendages
Definition
fat filled pouches
Term
functions of large intestine
Definition
-completes absorption of water
-manufactures vitamins
-contains normal flora
-formation, storage, expulsion of feces
Term
appendix location
Definition
-LRQ
-retrocecal
Term
appendix structure
Definition
-fingerlike projections 2-3 in
-blind pouch
-contains lymph tissue
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