bucc/o
cheek
Ex. Buccoversion
turning toward the cheek
dent/o, dent/I
tooth, teeth
Ex. Edentulous
without teeth
odont/o
tooth, teeth
Ex. Periodontics
dental specialty that deals with the study and treatment of the tissues around the teeth
gingiv/o
gum (gingiva)
Ex. Gingivectomy
excision of gum tissue
gloss/o
tongue
Ex. Glossoplegia
paralysis (-plegia) of the tongue
lingu/o
tongue
Ex. Orolingual
pertaining to the mouth and tongue
gnath/o
jaw prognathous
having a projecting jaw
labi/o
lip
Ex. Labium
lip or liplike structure
or/o
mouth
Ex. Circumoral
around the mouth
stoma, stomat/o
mouth
Ex. Xerostomia
dryness (xero-) of the mouth
palat/o
palate
Ex. Palatine
pertaining to the palate (also palatal)
sial/o
saliva, salivary gland, salivary duct
Ex. Sialogram
radiograph of the salivary glands and ducts
uvul/o
uvula
Ex. Uvulotome
instrument (-tome) for incising the uvula
esophag/o
esophagus
Ex. Esophageal
pertaining to the esophagus
gastr/o
stomach
Ex. Gastroparesis
partial paralysis (paresis) of the stomach
pylor/o
pylorus
Ex. Pyloroplasty
plastic repair of the pylorus
enter/o
intestine
Ex. Dysentery
infectious disease of the intestine
duoden/o
duodenum
Ex. Duodenostomy
surgical creation of an opening into the duodenum
jejun/o
jejunum
Ex. Jejunectomy
excision of the jejunum
ile/o
ileum
Ex. Ileitis
inflammation of the ileum
cec/o
cecum
Ex. Cecoptosis
downward displacement of the cecum
col/o, colon/o
colon
Ex. Coloclysis
irrigation (-clysis) of the colon
sigmoid/o
sigmoid colon
sigmoidoscope an endoscope for examining the sigmoid colon
rect/o
rectum
Ex. Rectocele
hernia of the rectum
proct/o
rectum
Ex. Proctopexy
surgical fixation of the rectum
an/o
anus
Ex. Perianal
around the anus
hepat/o
liver
Ex. Hepatocyte
a liver cell
bili
bile
Ex. Biliary
pertaining to the bile or bile ducts
chol/e, chol/o
bile, gall
Ex. Cholestasis
stoppage of bile flow
cholecyst/o
gallbladder
Ex. Cholecystogram
radiograph of the gallbladder
cholangi/o
bile duct
Ex. Cholangioma
cancer of the bile ducts
choledoch/o
common bile duct
Ex. Choledochal
pertaining to the common bile duct
pancreat/o
pancreas
Ex. Pancreatotropic
acting on the pancreas
anus
The distal opening of the digestive tract (root: an/o)
appendix
An appendage; usually means the narrow tube of lymphatic tissue attached to the cecum, the vermiform (wormlike) appendix
bile
The fluid secreted by the liver that emulsified fats and aids in their absorption (roots: chol/e, bili)
cecum
A blind pouch at the beginning of the large intestine (root: cec/o)
colon
The major portion of the large intestine; extends from the cecum to the rectum and is formed by ascending, transverse, and descending portions (root: col/o, colon/o)
common bile duct
The duct that carries bile into the duodenum; formed by the union of the cystic duct and the common hepatic duct (root: choledoch/o)
duodenum
The first portion of the small intestine (root: duoden/o)
enzyme
An organic catalyst; speeds the rate of chemical reactions
esophagus
The muscular tube that carries food from the pharynx to the stomach.
feces
The waste material eliminated from the intestine (adjective: fecal); stool
gallbladder
A sac on the undersurface of the liver that stores bile (root: cholecyst/o)
hepatic portal system
A special pathway of the circulation that brings blood directly from the abdominal organs to the liver for processing (also called simply the portal system). The vessel that enters the liver is the hepatic portal vein (portal vein).
ileum
The terminal portion of the small intestine (root: ile/o)
intestine
The portion of the digestive tract between the stomach and the anus. It consists of the small intestine and large intestine. It functions in digestion, absorption, and elimination of waste (root: enter/o). The bowel (BOW-el)
jejunum
The middle portion of the small intestine (root: jejun/o)
lacteal
A lymphatic capillary in a villus of the small intestine. Lacteals absorb digested fats into the lymph
large intestine
The terminal portion of the digestive tract, consisting of the cecum, colon, rectum, and anus. It stores and eliminates undigested waste material (feces)
liver
The large gland in the upper right part of the abdomen. In addition to many other functions, it secretes bile needed for digestion and absorption of fats (root: hepat/o)
lower esophageal sphincter (LES)
Muscle tissue at the distal end of the esophagus (gastroesophageal junction) that prevents stomach contents from refluxing into the esophagus. Also called the cardiac sphincter
mastication
Chewing
mouth
The oral cavity; contains the tongue and teeth. Used to take in and chew food, mix it with saliva, and move it toward the throat to be swallowed
palate
The roof of the mouth; the partition between the mouth and nasal cavity; consists of an anterior portion formed by bone, the hard palate, and a posterior portion formed of tissue, the soft palate (root: palat/o)
pancreas
A large, elongated gland behind the stomach. It produces hormones that regulate sugar metabolism and also produces digestive enzymes (root: pancreat/o)
peristalsis
Wavelike contractions of an organ's walls; moves material through an organ or duct
peritoneum
The serous membrane that lines the abdominal cavity and supports the abdominal organs
pharynx
The throat; a common passageway for food entering the esophagus and air entering the larynx (root: pharyng/o)
pylorus
The stomach's distal opening into the duodenum. The opening is controlled by a ring of muscle, the pyloric sphincter (root: pylor/o)
rectum
The distal portion of the large intestine. It stores and eliminates undigested waste (root: rect/o, proct/o)
saliva
The clear secretion released into the mouth that moistens food and contains a starch-digesting enzyme (root: sial/o). Saliva is produced by three pairs of glands: the parotid, submandibular, and sublingual glands
sigmoid colon
Distal S-shaped portion of the large intestine located between the descending colon and the rectum
small intestine
The portion of the intestine between the stomach and the large intestine; comprised of the duodenum, jejunum, and ileum. Accessory organs secrete into the small intestine, and almost all digestion and absorption occur there
stomach
A muscular saclike organ below the diaphragm that stores food and secretes juices that digest proteins (root: gastr/o)
uvula
The fleshy mass that hangs from the soft palate; aids in speech production (literally “little grape”) (root: uvul/o)
villi
Tiny projections in the lining of the small intestine that absorb digested foods into the circulation (singular: villus)
appendicitis
Inflammation of the appendix
ascites
Accumulation of fluid in the abdominal cavity; a form of edema. May be caused by heart disease, lymphatic or venous obstruction, cirrhosis, or changes in plasma composition
Barrett syndrome
Lower esophageal ulcer resulting from chronic esophagitis, often with constriction caused by mucosal changes; may be premalignant. Also called Barrett esophagus
biliary colic
Acute abdominal pain caused by gallstones in the bile ducts
bilirubin
A pigment released in the breakdown of hemoglobin from red blood cells; mainly excreted by the liver in bile
caries
Tooth decay
celiac disease
Inability to absorb foods containing gluten, a protein found in wheat and some other grains; caused by an excess immune response to gluten
cholecystitis
Inflammation of the gallbladder
cholelithiasis
The condition of having stones in the gallbladder; also used to refer to stones in the common bile duct
cirrhosis
Chronic liver disease with degeneration of liver tissue
Crohn disease
A chronic inflammatory disease of the gastrointestinal tract usually involving the ileum and colon
diarrhea
The frequent passage of watery bowel movements
diverticulitis
Inflammation of diverticula (small pouches) in the wall of the digestive tract, especially in the colon
diverticulosis
The presence of diverticula, especially in the colon
dysphagia
Difficulty in swallowing
emesis
Vomiting
fistula
An abnormal passageway between two organs or from an organ to the body surface, such as between the rectum and anus (anorectal fistula)
gastroenteritis
Inflammation of the stomach and intestine
gastroesophageal reflux disease (GERD)
Condition caused by reflux of gastric juices into the esophagus resulting in heartburn, regurgitation, inflammation, and possible damage to the esophagus; caused by weakness of the lower esophageal sphincter (LES)
heartburn
A warm or burning sensation felt behind the sternum and radiating upward. Commonly associated with gastroesophageal reflux. Medical name is pyrosis (pyr/o means “heat”)
hemorrhoids
Varicose veins in the rectum associated with pain, bleeding, and sometimes prolapse of the rectum
hepatitis
Inflammation of the liver; commonly caused by a viral infection
hepatomegaly
Enlargement of the liver
hiatal hernia
A protrusion of the stomach through the opening (hiatus) in the diaphragm through which the esophagus passes
icterus
Jaundice
ileus
Intestinal obstruction. May be caused by lack of peristalsis (adynamic, paralytic ileus) or by contraction (dynamic ileus). Intestinal matter and gas may be relieved by insertion of a drainage tube
intussusception
Slipping of one part of the intestine into another part below it. Occurs mainly in male infants in the ileocecal region). May be fatal if untreated for more than one day
jaundice
A yellowish color of the skin, mucous membranes, and whites of the eye caused by bile pigments in the blood (from French jaune meaning “yellow”). The main pigment is bilirubin, a byproduct of erythrocyte destruction
leukoplakia
White patches on mucous membranes, as on the tongue or cheeks, often resulting from smoking or other irritants; may be precancerous
nausea
An unpleasant sensation in the upper abdomen that often precedes vomiting. Typically occurs in digestive upset, motion sickness, and sometimes early pregnancy
occult blood
Blood present in such small amounts that it can be detected only microscopically or chemically; in the feces, a sign of intestinal bleeding (occult means “hidden”)
pancreatitis
Inflammation of the pancreas
peptic ulcer
A lesion in the mucous membrane of the esophagus, stomach, or duodenum caused by the action of gastric juice
peritonitis
Inflammation of the peritoneum, the membrane that lines the abdominal cavity and covers the abdominal organs. May result from perforation of an ulcer, rupture of the appendix, or infection of the reproductive tract, among other causes.
polyp
A tumor that grows on a stalk and bleeds easily
portal hypertension
An abnormal pressure increase in the hepatic portal system. May be caused by cirrhosis, infection, thrombosis, or tumors
pyloric stenosis
Narrowing of the opening between the stomach and the duodenum; pylorostenosis
regurgitation
A backward flowing, such as the backflow of undigested food
splenomegaly
Enlargement of the spleen
ulcerative colitis
Chronic ulceration of the rectum and colon; the cause is unknown, but may involve autoimmunity
volvulus
Twisting of the intestine resulting in obstruction. Usually involves the sigmoid colon and occurs most often in children and in the elderly. May be caused by congenital malformation, a foreign body, or adhesion. Failure to treat immediately may result in death
anastomosis
A passage or communication between two vessels or organs. May be normal or pathologic, or may be created surgically
barium study
Use of barium sulfate as a liquid contrast medium for fluoroscopic or radiographic study of the digestive tract. Can show obstruction, tumors, ulcers, hiatal hernia, and motility disorders, among other things
cholecystectomy
Surgical removal of the gallbladder
Dukes classification
A system for staging colorectal cancer based on degree of penetration of the bowel wall and lymph node involvement; severity is graded from A to C
endoscopy
Use of a fiberoptic endoscope for direct visual examination. GI studies include esophagogastroduodenoscopy, proctosigmoidoscopy (rectum and distal colon), and colonoscopy (all regions of the colon)
ERCP
Endoscopic retrograde cholangiopancreatography; a technique for viewing the pancreatic and bile ducts and for performing certain techniques to relieve obstructions. Contrast medium is injected into the biliary system from the duodenum and radiographs are taken
ostomy
An opening into the body; generally refers to an opening created for elimination of body waste. Also refers to the operation done to create such an opening (see stoma)
stoma
A surgically created opening to the body surface or between two organs (literally “mouth”)
bolus
A mass, such as the rounded mass of food that is swallowed
cardia
The part of the stomach near the esophagus, named for its closeness to the heart
chyme
The semiliquid partially digested food that moves from the stomach into the small intestine
defecation
The evacuation of feces from the rectum
deglutition
Swallowing
duodenal bulb
The part of the duodenum near the pylorus; the first bend (flexure) of the duodenum
duodenal papilla
The raised area where the common bile duct and pancreatic duct enter the duodenum; papilla of Vater (FA-ter)
greater omentum
A fold of the peritoneum that extends from the stomach over the abdominal organs
hepatic flexure
The right bend of the colon, forming the junction between the ascending colon and the transverse colon
ileocecal valve
A valve-like structure between the ileum of the small intestine and the cecum of the large intestine
mesentery
The portion of the peritoneum that folds over and supports the intestine
mesocolon
The portion of the peritoneum that folds over and supports the colon
papilla of Vater
See duodenal papilla
rugae
The large folds in the lining of the stomach seen when the stomach is empty
sphincter of Oddi
The ring of muscle at the opening of the common bile duct into the duodenum
splenic flexure
The left bend of the colon, forming the junction between the transverse colon and the descending colon
achalasia
Failure of a smooth muscle to relax, especially the lower esophageal sphincter, so that food is retained in the esophagus
achlorhydria
Lack of hydrochloric acid in the stomach; opposite is hyperchlorhydria
anorexia
Loss of appetite. Anorexia nervosa is a psychologically induced refusal or inability to eat (adjectives: anorectic, anorexic)
aphagia
Refusal or inability to eat; inability to swallow or difficulty in swallowing
aphthous ulcer
An ulcer in a mucous membrane, as in the mouth
bruxism
Clenching and grinding of the teeth, usually during sleep
bulimia
Excessive, insatiable appetite. A disorder characterized by overeating followed by induced vomiting, diarrhea, or fasting
cachexia
Profound ill health, malnutrition, and wasting
cheilosis
Cracking at the corners of the mouth, often caused by B vitamin deficiency (root cheil/o means “lip”)
cholestasis
Stoppage of bile flow
constipation
Infrequency or difficulty in defecation and the passage of hard, dry feces
dyspepsia
Poor or painful digestion
eructation
Belching
familial adenomatous polyposis (FAP)
A heredity condition in which multiple polyps form in the colon and rectum, predisposing to colorectal cancer
flatulence
Condition of having gas or air in the GI tract
flatus
Gas or air in the gastrointestinal tract; gas or air expelled through the anus
hematemesis
Vomiting of blood
irritable bowel syndrome (IBS)
A chronic stress-related disease characterized by diarrhea, constipation, and pain associated with rhythmic contractions of the intestine. Mucous colitis; spastic colon
megacolon
An extremely dilated colon. Usually congenital but may occur in acute ulcerative colitis
melena
Black tarry feces resulting from blood in the intestines. Common in newborns. May also be a sign of gastrointestinal bleeding
obstipation
Extreme constipation
pernicious anemia
A form of anemia caused by the stomach’s failure to secrete intrinsic factor, a substance needed for the absorption of vitamin B12
pilonidal cyst
A dermal cyst in the sacral region, usually at the top of the cleft between the buttocks. May become infected and begin to drain.
thrush
Fungal infection of the mouth and/or throat caused by Candida; appears as mucosal white patches or ulcers
Vincent disease
Severe gingivitis with necrosis associated with the bacterium Treponema vincentii; necrotizing ulcerative gingivitis; trench mouth
appendectomy
Surgical removal of the appendix
bariatrics
The branch of medicine concerned with prevention and control of obesity and associated diseases (from Greek baros, meaning “weight”)
bariatric surgery
Surgery to reduce the size of the stomach and reduce nutrient absorption in the treatment of morbid obesity.
Billroth operations
Gastrectomy with anastomosis of the stomach to the duodenum (Billroth I) or to the jejunum (Billroth II)
gastric bypass surgery
Division of the stomach and anastomosis of its upper part to the small intestine (jejunum) to reduce nutrient absorption; used to treat morbid obesity. Other surgical methods are used for this purpose, including partition of the stomach with rows of staples (gastric stapling)
gavage
Process of feeding through a nasogastric tube into the stomach
lavage
Washing out of a cavity; irrigation
manometry
Measurement of pressure; pertaining to the GI tract, measurement of pressure in the portal system as a sign of obstruction
Murphy sign
Inability to take a deep breath when fingers are pressed firmly below the right arch of the ribs (below the liver). Signifies gallbladder disease
nasogastric (NG) tube
Tube that is passed through the nose into the stomach. May be used for emptying the stomach, administering medication, giving liquids, or sampling stomach contents.
parenteral hyperalimentation
Complete intravenous feeding for one who cannot take in food. Total parenteral nutrition (TPN)
percutaneous endoscopic gastrostomy (PEG) tube
Tube inserted into the stomach for long-term feeding
vagotomy
Interruption of impulses from the vagus nerve to reduce stomach secretions in the treatment of gastric ulcer. Originally done surgically but may also be done with drugs
antacid
Agent that counteracts acidity, usually gastric acidity
antidiarrheal
Treats or prevents diarrhea by reducing intestinal motility or absorbing irritants and soothing the intestinal lining
antiemetic
Agent that relieves or prevents nausea and vomiting
antiflatulent
Agent that prevents or relieves flatulence
antispasmodic
Agent that relieves spasm, usually of smooth muscle
emetic
An agent that causes vomiting
histamine H2 antagonist
Drug that decreases secretion of stomach acid by interfering with the action of histamine at H2 receptors. Used to treat ulcers and other gastrointestinal problems. H2-receptor-blocking agent
laxative
Promotes elimination from the large intestine. Types include stimulants, substances that retain water (hyperosmotics), stool softeners, and bulk-forming agents
proton-pump inhibitor (PPI)
Agent that inhibits secretion of stomach acid by blocking the transport of hydrogen ions (protons) into the stomach
BE
Barium enema (for radiographic study of the colon)
BM
Bowel movement
CBD
Common bile duct
EGD
Esophagogastroduodenoscopy
ERCP
Endoscopic retrograde cholangiopancreatography
FAP
Familial adenomatous polyposis
GERD
Gastroesophageal reflux disease
GI
Gastrointestinal
HAV
Hepatitis A virus
HBV
Hepatitis B virus
HCV
Hepatitis C virus
HDV
Hepatitis D virus
HEV
Hepatitis E virus
HCl
Hydrochloric acid
IBD
Inflammatory bowel disease
IBS
Irritable bowel syndrome
LES
Lower esophageal sphincter
NG
Nasogastric (tube)
N & V
Nausea and vomiting
N/V/D
Nausea, vomiting, and diarrhea
PONV
Postoperative nausea and vomiting
PPI
Proton pump inhibitor
TPN
Total parenteral nutrition
UGI
Upper gastrointestinal (radiograph series)