Medical Terminology: The Digestive System – Comprehensive Study Notes

Chapter 10: The Digestive System

Learning Objectives

This chapter introduces the terminology, anatomy, pathophysiology, signs and symptoms, diseases, disorders, treatments, procedures, devices, and abbreviations associated with the digestive system. Students will learn to define, spell, and construct medical terms, as well as understand their clinical applications.

• Define and spell word parts used in digestive system terminology.

• Break down and define common medical terms for symptoms, diseases, disorders, procedures, treatments, and devices.

• Build medical terms from word parts.

• Pronounce and spell common medical terms associated with the digestive system.

Word Parts Associated with the Digestive System

Combining Forms and Roots

Medical terms for the digestive system are constructed from specific word parts, including roots, prefixes, and suffixes. Understanding these components is essential for accurate communication and comprehension in medical settings.

• abdomin/o – abdomen

• an/o – anus

• append/o, appendic/o – appendix

• bil/i – bile

• cec/o – cecum

• chol/e – bile, gall

• choledoch/o – common bile duct

• col/o, colon/o – colon

• cyst/o – bladder, sac

• dent/o – tooth

• duoden/o – duodenum

• enter/o – intestine

• esophag/e, esophag/o – esophagus

• gastr/o – stomach

• gingiv/o – gums

• gloss/o – tongue

• hepat/o – liver

• ile/o – ileum

• jejun/o – jejunum

• lingu/o – tongue

• or/o – mouth

• pancreat/o – pancreas

• peps/o, pept/o – digestion

• peritone/o – peritoneum

• proct/o – rectum, anus

• pylor/o – pylorus

• rect/o – rectum

• sial/o – saliva, salivary gland

• sigm/o – sigmoid colon

• stomat/o – mouth

Prefixes and Suffixes

• Prefixes: a-, dia-, dys-, re-, an-, mal-, anti-, endo-

• Suffixes: -algia, -dynia, -emesis, -emia, -ia, -megaly, -osis, -rrhea, -al, -ectasis, -iasis, -ic, -itis, -malacia, -oid, -oma, -pathy, -ptosis, -sis, -y, -centesis, -ectomy, -emetic, -gram, -graphy, -plasty, -rrhaphy, -scopy, -spasmodic, -stomy, -tomy

Anatomy of the Digestive System

Overview and Main Organs

The digestive system converts food into usable energy and nutrients for growth and repair. It consists of the gastrointestinal (GI) tract and accessory organs that secrete enzymes and chemicals to aid digestion.

• GI Tract: Mouth, pharynx, esophagus, stomach, small intestine, large intestine

• Accessory Organs: Salivary glands, pancreas, liver, gallbladder

Organs of the Digestive System

The digestive system includes various organs, each with specific functions in the breakdown and absorption of nutrients.

The Oral Cavity

The oral cavity is the entry point for food and is involved in mechanical and chemical digestion.

Pathophysiology of the Digestive System

Microbiota and Infection Risk

The digestive system is constantly exposed to potential pathogens. The GI tract contains a large population of bacteria known as microbiota, which are normally harmless but can cause severe infections if their balance is disrupted or if they spread to other areas.

• Inherited defects and tumors can affect GI organs.

• Specialists: Head and neck specialists (mouth/throat), gastroenterologists (stomach/intestines), proctologists (rectal/anal), hepatobiliary specialists (liver), oncologists (cancer), internal medicine doctors (routine GI problems).

Signs and Symptoms of Digestive System Disorders

Common Terms and Their Word Parts

• Aphagia: Inability to swallow

• Ascites: Accumulation of fluid in the abdominal cavity

• Constipation: Difficulty in passing stools

• Diarrhea: Frequent, watery bowel movements

• Dyspepsia: Difficult digestion (dys- = difficult, peps/o = digestion, -ia = condition of)

• Dysphagia: Difficulty swallowing

• Flatus/Flatulence: Gas in the digestive tract

• Gastrodynia: Stomach pain

• Halitosis: Bad breath

• Hematemesis: Vomiting blood (hemat/o = blood, -emesis = vomiting)

• Hepatomegaly: Enlarged liver

• Jaundice: Yellowing of skin and eyes due to liver dysfunction

• Nausea: Sensation of needing to vomit

• Reflux: Backflow of stomach contents into the esophagus

• Steatorrhea: Fatty discharge (steat/o = fat, -rrhea = discharge)

Ascites

Ascites is often seen in malnutrition or liver/heart disease, where fluid accumulates in the abdominal cavity.

Jaundice

Jaundice is a clinical sign of liver disease, characterized by yellowing of the sclera and skin.

Diseases and Disorders of the Digestive System

Common Diseases and Disorders

• Anorexia nervosa: Eating disorder characterized by self-starvation

• Appendicitis: Inflammation of the appendix

• Bulimia: Eating disorder involving binge eating and purging

• Cheilitis/Cheilosis: Inflammation/cracking of the lips

• Cholecystitis: Inflammation of the gallbladder (cholecyst/o = gallbladder, -itis = inflammation)

• Choledochitis: Inflammation of the common bile duct

• Cholelithiasis: Gallstones

• Choledocholithiasis: Stones in the common bile duct

• Cirrhosis: Chronic liver deterioration

• Cleft palate: Congenital defect of the palate

• Colitis: Inflammation of the colon (ulcerative colitis)

• Colon cancer: Tumors in the colon/rectum (colorectal cancer)

• Crohn’s disease: Chronic inflammatory bowel disease

• Diverticulosis/Diverticulitis: Presence/inflammation of abnormal pouches in the colon

• Duodenal ulcer: Ulcer in the duodenum

• Dysentery: Severe diarrhea with blood

• Enteritis: Inflammation of the intestine

• Esophagitis: Inflammation of the esophagus

• Esophagomalacia: Softening of the esophagus

• Esophageal cancer: Malignant tumor of the esophagus

• Food-borne illness: Disease caused by contaminated food

• Gastrectasis: Expansion/dilation of the stomach (gastromegaly)

• Gastric cancer: Malignant tumor of the stomach

• Gastric ulcer: Ulcer in the stomach

• Gastritis: Inflammation of the stomach

• Gastroenteritis: Inflammation of stomach and intestines

• Gastroduodenitis: Inflammation of stomach and duodenum

• Gastroenterocolitis: Inflammation of stomach, intestines, and colon

• Gastroesophageal reflux disease (GERD): Chronic reflux of stomach contents

• Gastromalacia: Softening of the stomach

• Giardiasis: Infection by Giardia protozoan

• Gingivitis: Inflammation of the gums

• Glossitis: Inflammation of the tongue (glossopathy)

• Hemorrhoids: Swollen veins in the rectal area

• Hepatitis: Inflammation of the liver

• Malignant hepatoma: Liver cancer (hepatocellular carcinoma, HCC)

• Hiatal hernia: Stomach protrudes through the diaphragm

• Inguinal hernia: Protrusion in the groin area

• Umbilical hernia: Protrusion near the navel

• Strangulated hernia: Hernia with compromised blood supply

• Inflammatory bowel disease (IBD): Chronic inflammation of the GI tract

• Intussusception: Infolding of the intestine

• Irritable bowel syndrome (IBS): Functional disorder of the bowel

• Lactose intolerance: Inability to digest lactose

• Malabsorption syndrome: Poor absorption of nutrients (celiac disease, gluten sensitivity enteropathy)

• Pancreatitis: Inflammation of the pancreas

• Parotitis: Inflammation of the parotid gland (sialadenitis)

• Peptic ulcer: Ulcer in the stomach or duodenum

• Peritonitis: Inflammation of the peritoneum

• Polyposis: Multiple polyps in the colon

• Proctitis: Inflammation of the rectum

• Proctoptosis: Drooping of the rectum

• Volvulus: Twisting of the intestine causing obstruction

Appendicitis

Appendicitis is the inflammation of the appendix, which can lead to severe abdominal pain and requires surgical removal.

Cholecystitis, Cholelithiasis, Choledocholithiasis

These conditions involve inflammation and stones in the gallbladder and bile ducts, leading to pain and digestive disturbances.

Cirrhosis

Cirrhosis is a chronic liver disease where healthy cells are replaced by connective tissue and fat, impairing liver function.

Cleft Palate

Cleft palate is a congenital defect where the bones of the palate fail to fuse, creating a gap between the mouth and nasal cavity.

Colon Cancer

Colon cancer involves the growth of malignant tumors in the colon and rectum, often detected during colonoscopy.

Diverticulosis and Diverticulitis

Diverticulosis is the presence of abnormal pouches (diverticula) in the colon; diverticulitis is their inflammation, increasing cancer risk.

Gastric Cancer

Gastric cancer is a malignant tumor originating in the stomach wall, which can spread to other organs.

Giardiasis

Giardiasis is an infection caused by Giardia protozoan, affecting the small intestine and leading to malabsorption.

Hiatal Hernia

Hiatal hernia occurs when the stomach protrudes through the diaphragm, often causing reflux and esophagitis.

Intussusception

Intussusception is the infolding of the small intestine, reducing motility and causing obstruction.

Celiac Disease

Celiac disease is a form of malabsorption syndrome caused by an immune reaction to gluten, resulting in destruction of intestinal villi.

Peptic Ulcer

Peptic ulcers are open sores in the stomach or duodenum, commonly caused by H. pylori infection.

Polyposis

Polyposis is the development of multiple polyps along the inner wall of the large intestine.

Volvulus

Volvulus is a twisting of the intestine, leading to obstruction and severe complications.

Treatments, Procedures, and Devices

Common Procedures and Devices

• Abdominocentesis: Surgical puncture of the abdomen to remove fluid

• Antacid: Medication to neutralize stomach acid

• Antiemetic: Medication to prevent vomiting

• Antispasmodic: Medication to reduce muscle spasms

• Appendectomy: Surgical removal of the appendix

• Bariatric surgery: Surgical treatment for obesity (gastric band, Roux-en-Y gastric bypass)

• Cathartic: Medication to promote bowel movements

• Cheilorrhaphy: Surgical repair of the lip

• Cholecystectomy: Removal of the gallbladder

• Cholecystogram/Cholecystography: Imaging of the gallbladder

• Choledocholithotomy: Incision to remove stones from the common bile duct

• Colonoscopy: Visual examination of the colon using a colonoscope

• Total/Partial/Hemicolectomy: Removal of all/part of the colon

• Colostomy: Creation of an artificial opening (stoma) for waste elimination

• Fecal occult blood test (FOBT): Test for hidden blood in stool

• Gastrectomy: Removal of the stomach

• Gastric lavage: Washing out the stomach

• Gavage: Feeding through a nasogastric tube

• GI endoscopy: Visual examination of the GI tract (esophagoscopy, gastroscopy, esophagogastroduodenoscopy)

• GI series: Imaging of the GI tract using barium (upper GI series, lower GI series, barium swallow, barium enema)

• Gingivectomy: Removal of gum tissue

• Glossorrhaphy: Repair of the tongue

• Hemorrhoidectomy: Removal of hemorrhoids

• Herniorrhaphy: Repair of a hernia

• Ileostomy: Creation of an opening in the ileum

• Laparotomy: Surgical incision into the abdomen

• Laparoscopy: Minimally invasive abdominal surgery using a laparoscope

• Polypectomy: Removal of polyps

• Pyloroplasty: Surgical repair of the pylorus

• Stool culture and sensitivity (C&S): Test for pathogens in stool

• Vagotomy: Cutting the vagus nerve to reduce acid secretion

Bariatric Surgery

Bariatric surgery includes procedures such as adjustable gastric band and Roux-en-Y gastric bypass for obesity treatment.

Colonoscopy

Colonoscopy is a procedure using a flexible colonoscope to visually examine the colon for tumors and other abnormalities.

Colostomy

Colostomy involves creating an artificial opening (stoma) in the colon for waste elimination, often accompanied by a storage bag.

GI Endoscopy

GI endoscopy is the visual examination of the interior of the GI tract using specialized instruments.

GI Series

GI series includes upper and lower GI imaging using barium to visualize the digestive tract.

Laparoscopy

Laparoscopy is a minimally invasive abdominal surgery using a laparoscope inserted through small incisions.

Abbreviations of the Digestive System

Common Abbreviations

• B E: Barium enema

• C&S: Culture and sensitivity

• E G D: Esophagogastroduodenoscopy

• F O B T: Fecal occult blood test

• G E R D: Gastroesophageal reflux disease

• G I: Gastrointestinal

• H A V: Hepatitis A virus

• H B V: Hepatitis B virus

• H C V: Hepatitis C virus

• H C C: Hepatocellular carcinoma

• I B D: Inflammatory bowel disease

• I B S: Irritable bowel syndrome

• L G I: Lower gastrointestinal

• L I: Large intestine

• N&V: Nausea and vomiting

• U G I: Upper gastrointestinal

Summary Table: Key Word Parts and Their Meanings

Word Part	Meaning
abdomin/o	abdomen
an/o	anus
append/o, appendic/o	appendix
chol/e	bile, gall
col/o, colon/o	colon
duoden/o	duodenum
enter/o	intestine
gastr/o	stomach
hepat/o	liver
ile/o	ileum
jejun/o	jejunum
pancreat/o	pancreas
proct/o	rectum, anus
rect/o	rectum
sigm/o	sigmoid colon
stomat/o	mouth

Conclusion

This chapter provides a comprehensive overview of medical terminology related to the digestive system, including word parts, anatomy, pathophysiology, signs and symptoms, diseases, disorders, treatments, procedures, devices, and abbreviations. Mastery of these terms is essential for effective communication and understanding in medical practice.