Chapter 13: Digestive System Flashcards
Peristalsis
wave-like contractions of the organ walls to move through the digestive tract and move undigested waste out of body
enzymes
produce catalysts that speed up the rate of food breakdown (-ase)
alimentary canal
other word for digestive tract
palate
roof of mouth
Hard palate = bone
soft palate = soft tissue
uvula
fleshy, hangs from soft palate, speech
mastication
process of chewing
saliva
starch digestion
lower esophageal sphincter (LES)
at distal end of esophagus, this sphincter keeps stomach contents from refluxing
(ALSO CALLED CARDIAC SPHINCTER)
pylorus
lower portion of stomach
Small intestine parts
duodenum
jejunum
ileum
villi
small projections on intestines that absorb nutrients and add to circulation
each villus has capillaries (lymphatic -lacteals- and blood)
lacteal
lymphatic capillary in villus
large intestine parts
cecum (small pouch where it begins, appendix is here), colon, sigmoid colon, rectum
liver
large gland
- process blood
- removes toxins
- converting nutrients
hepatic portal system (blood from liver)
BILE to digest fats
gallbladder
stores bile produced in liver until needed for digestion
- common bile duct empties in duodenum
pancreas
produces mixture of digestive enzymes that delivered to duodenum thru pancreatic duct
bicarbonate is basic and neutralizes stomach acid
where is saliva produced
3 glands
- parotid
- submanibular
- sublingual
bucc/o
cheek
dent/i-o
teeth
odont/o
tooth
gingiv/o
gum
gloss/o
tongue
lingu/o
tongue
gnath/o
jaw
labi/o
lip
or/o
mouth
stoma, stomat/o
mouth
palat/o
palate
sial/o
saliva, salivary gland, salivary duct
uvul/o
uvula
esophag/o
esophagus
gastr/o
stomach
pylor/o
pylorus
enter/o
interstine
duoden/o
duodenum
jejun/o
jejunum
ile/o
ileum
cec/o
cecum
col/o, colon/o
colon
sigmoid/o
sigmoid colon
rect/o
rectum
proct/o
rectum
an/o
anus
hepat/o
liver
bili
bile
chol/e, chol/o
bile, gall
cholecyst/o
gallbladder
cholangi/o
bile duct
choledoch/o
common bile duct
pancreat/o
pancreas
caries
tooth decay
periodontitis
infection of deeper tissues and bony support around tooth
appendicitis
infection of appendix after obstruction (can lead to peritonitis)
peritonitis
infection of peritoneal cavity
ulcer
lesion of skin or mucous membrane (inflammation/tissue damage)
peptic ulcer
ulcer caused by gastric juices (caused by H. pylori, stress, etc)
barium study
radiographic contrast to reveal GI issues (including ulcers)
leukoplakia
white patches on mucous membranes is early sign of canccer
most common GI cancer
colon, rectum
polyps
growths that can be removed by endoscopy
occult blood
blood in small amounts in stool (can indicate colon cancers)
Duke’s classification
ranges from A to C to classify colorectal cancers
types of scopes
proctoscope - rectum
sigmoidoscope
colonoscope
anastomosis
sometimes needed (connect two organs, eg gastroduodenostomy)
hiatal hernia
stomach moves into chest cavity through hiatal space in diaphragm
pyloric stenosis
opening between stomach and small intestine is too narrow (opening between stomach and small intestine is too narrow)
projectile vomiting
intussesception
slipping of intestinal segment into a part below it
volvulus
twisting of intestine
ileus
intestinal obstruction caused by lack of peristalsis
GERD
reflux of gastric juices into esophagus due to weakness at gastroesophageal junction
irritate esophagus (heartburn)
barrett syndrome
esophagus is replaced with epithelium similar to stomach/intestines b/c of GERD
spasms, scar tissue, cancer
IBD
crohn disease, ulcerative colitis
young adults/adolescents, hereditary (immunologic response, flora)
crohn disease
chronic inflammation of intestinal wall (ileum and colon, diarrhea, abscess, fistula)
ulcerative colitis
inflammation of colon lining (begins in rectum and extends)
diverticulitis
commonly affects colon
small pouches in intestinal wall that appear with age, diet low in fiber
collection of waste and bacteria lead to inflammation, pain, bleeding
hepatitis
inflammation/death of liver cells
5 forms, viral in industrialized countries
A- fecal/oral, unsanitary conditions
B- blood/bodily fluids
C- blood
D- delta virus, only affects people with B
E- contaminated food/water
jaundice
symptom of hepatitis, presence of bile pigments in blood
icterus
another name for jaundice
cirrhosis
ALCOHOL
chronic liver disease - hepatomegaly, edema, ascites, jaundice
complication is portal hypertension
portal hypertension
can cause varicose veins and hemorrhage, along with splenomegaly
cholelithiasis
gallstones
cholecyctitis
inflammation of gallbladder
- biliary colic or pain in RUQ
(estrogen, pregnancy, obesity)
cholecystectomy
removal of gallbladder
endoscopic retrograde cholangiopancreatography (ERCP)
technique for visualizing/correcting biliary/pancreatic duct obstructions w/ contrast
pancreatitis
inflammation of pancreas
ascites
accumulation of fluid in abdominal cabity
divurticulosis
presence of diverticula
gastroenteritis
inflammation of stomach/intestine
stoma
surgical opening to body surface between two organs