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Copyright © 2014, 2011, 2007 by Saunders, an imprint of Elsevier Inc. 1
The Language OfThe Language Of
MedicineMedicine
1010thth
editionedition
Davi-Ellen ChabnerDavi-Ellen Chabner
Chapter 5
Digestive System
Copyright © 2014, 2011, 2007 by Saunders, an imprint of Elsevier Inc. 2
Copyright © 2014, 2011, 2007 by Saunders, an imprint of Elsevier Inc. 3
Chapter Goals
• Name the organs of the digestive system and
describe their locations and functions.
• Define combining forms for organs and know
the meaning of related terminology.
• Describe signs, symptoms, and disease
conditions affecting the digestive system.
Copyright © 2014, 2011, 2007 by Saunders, an imprint of Elsevier Inc. 4
Chapter 5
Lesson 5.1
Copyright © 2014, 2011, 2007 by Saunders, an imprint of Elsevier Inc. 5
Introduction
The digestive or gastrointestinal system
performs four main functions:
• ingestion
• digestion
• absorption
• elimination
Copyright © 2014, 2011, 2007 by Saunders, an imprint of Elsevier Inc. 6
Introduction:
Ingestion and Digestion
• Ingestion—food material taken into mouth
• Digestion—food is broken down, mechanically
and chemically, as it travels through the
gastrointestinal tract.
Digestive enzymes aid the breakdown of complex
nutrients.
• Proteins → amino acids
• Sugars → glucose
• Fats → fatty acids or triglycerides
Copyright © 2014, 2011, 2007 by Saunders, an imprint of Elsevier Inc. 7
Introduction:
Absorption
• Digested food passes into the bloodstream
through lining cells of the small intestine.
• Nutrients travel to all cells of the body.
• Cells burn nutrients to release the energy
stored in food.
Copyright © 2014, 2011, 2007 by Saunders, an imprint of Elsevier Inc. 8
Introduction:
Elimination
• The body eliminates solid waste materials
that cannot be absorbed into bloodstream.
• The large intestine concentrates feces.
• The wastes pass out of the body through
the anus.
Copyright © 2014, 2011, 2007 by Saunders, an imprint of Elsevier Inc. 9
Organs of the Digestive System
• The gastrointestinal tract begins with the oral
cavity.
Copyright © 2014, 2011, 2007 by Saunders, an imprint of Elsevier Inc. 10
Oral Cavity
Major parts of the oral cavity
Copyright © 2014, 2011, 2007 by Saunders, an imprint of Elsevier Inc. 11
Oral Cavity (cont’d)
Major parts of the oral cavity
Copyright © 2014, 2011, 2007 by Saunders, an imprint of Elsevier Inc. 12
Oral Cavity (cont’d)
Upper permanent teeth within the dental
arch
→
Copyright © 2014, 2011, 2007 by Saunders, an imprint of Elsevier Inc. 13
Oral Cavity (cont’d)
Upper permanent teeth within the dental
arch
Copyright © 2014, 2011, 2007 by Saunders, an imprint of Elsevier Inc. 14
Oral Cavity (cont’d)
Anatomy of a tooth
Copyright © 2014, 2011, 2007 by Saunders, an imprint of Elsevier Inc. 15
Oral Cavity (cont’d)
Anatomy of a tooth
Copyright © 2014, 2011, 2007 by Saunders, an imprint of Elsevier Inc. 16
Oral Cavity (cont’d)
Salivary glands
Copyright © 2014, 2011, 2007 by Saunders, an imprint of Elsevier Inc. 17
Pharynx
Deglutition
Copyright © 2014, 2011, 2007 by Saunders, an imprint of Elsevier Inc. 18
Pharynx (cont’d)
Deglutition
Copyright © 2014, 2011, 2007 by Saunders, an imprint of Elsevier Inc. 19
Esophagus/Stomach
Parts of the stomach
Copyright © 2014, 2011, 2007 by Saunders, an imprint of Elsevier Inc. 20
Esophagus/Stomach (cont’d)
Parts of the stomach
Copyright © 2014, 2011, 2007 by Saunders, an imprint of Elsevier Inc. 21
The Digestive Tract
Copyright © 2014, 2011, 2007 by Saunders, an imprint of Elsevier Inc. 22
The Digestive Tract (cont’d)
Copyright © 2014, 2011, 2007 by Saunders, an imprint of Elsevier Inc. 23
Small Intestine
Villi in the lining of the small intestine
Copyright © 2014, 2011, 2007 by Saunders, an imprint of Elsevier Inc. 24
Large Intestine
Parts of the large intestine
Copyright © 2014, 2011, 2007 by Saunders, an imprint of Elsevier Inc. 25
Large Intestine (cont’d)
Parts of the large intestine
Copyright © 2014, 2011, 2007 by Saunders, an imprint of Elsevier Inc. 26
Liver, Gallbladder, and Pancreas
Parts of the liver, gallbladder, and pancreas
Copyright © 2014, 2011, 2007 by Saunders, an imprint of Elsevier Inc. 27
Liver, Gallbladder, and
Pancreas (cont’d)
Parts of the liver, gallbladder, and pancreas
Copyright © 2014, 2011, 2007 by Saunders, an imprint of Elsevier Inc. 28
Liver, Gallbladder, and Pancreas
(cont’d)
Besides producing bile, the liver:
• Helps maintain normal blood glucose levels
• Manufactures blood proteins necessary for
clotting
• Releases bilirubin, a pigment in bile
• Removes toxins and poisons from the blood
Copyright © 2014, 2011, 2007 by Saunders, an imprint of Elsevier Inc. 29
QUICK QUIZ:
1. What happens if bilirubin cannot leave the
body and remains in the bloodstream?
A. Gluconeogenesis
B. Emulsification
C. Hyperbilirubinemia
D. Glycogenolysis
Copyright © 2014, 2011, 2007 by Saunders, an imprint of Elsevier Inc. 30
Liver, Gallbladder, and Pancreas
The pancreas and its functions
Copyright © 2014, 2011, 2007 by Saunders, an imprint of Elsevier Inc. 31
Food Pathway through the GI Tract
Food enters
through the
oral cavity and
exits through
the anus
Copyright © 2014, 2011, 2007 by Saunders, an imprint of Elsevier Inc. 32
Food Pathway through the GI Tract
(cont’d)
Food enters
through the
oral cavity and
exits through
the anus
Copyright © 2014, 2011, 2007 by Saunders, an imprint of Elsevier Inc. 33
QUICK QUIZ:
2. Which term is the first part of the large
intestine?
A. Cecum
B. Duodenum
C. Jejunum
D. Pylorus
Copyright © 2014, 2011, 2007 by Saunders, an imprint of Elsevier Inc. 34
QUICK QUIZ: (cont’d)
3. Which term means swallowing?
A. Mastication
B. Deglutition
C. Emulsification
D. Peristalsis
Copyright © 2014, 2011, 2007 by Saunders, an imprint of Elsevier Inc. 35
Vocabulary
• absorption
• amino acids
• amylase
• anus
Passage of materials through the walls of the
small intestine into the bloodstream
Small building blocks of proteins; released
when proteins are digested
Enzyme secreted by the pancreas and salivary
glands to digest starch
Terminal end or opening of the digestive tract
to the outside of body
Copyright © 2014, 2011, 2007 by Saunders, an imprint of Elsevier Inc. 36
Vocabulary (cont’d)
• appendix
• bile
• bilirubin
• bowel
Blind pouch hanging from the cecum
Digestive juice made in the liver and stored in
the gallbladder; breaks up large fat globules;
composed of bile pigments, cholesterol, and
bile salts
Pigment released by the liver in bile
Intestine
Copyright © 2014, 2011, 2007 by Saunders, an imprint of Elsevier Inc. 37
Vocabulary (cont’d)
• canine teeth
• cecum
• colon
• common
bile duct
Pointed, dog-like teeth next to the incisors;
also called cuspids or eyeteeth
First part of the large intestine
Consists of the ascending, transverse,
descending, and sigmoid segments
Carries bile from the liver and gallbladder to
the duodenum; also called the choledochus
Copyright © 2014, 2011, 2007 by Saunders, an imprint of Elsevier Inc. 38
Vocabulary (cont’d)
• defecation
• deglutition
• dentin
• digestion
Elimination of feces from the digestive tract
through the anus
Swallowing
Primary material found in teeth; covered by
the enamel in the crown and a protective layer
of cementum in the root
Breakdown of complex foods to simpler forms
Copyright © 2014, 2011, 2007 by Saunders, an imprint of Elsevier Inc. 39
Vocabulary (cont’d)
• duodenum
• elimination
• emulsification
• enamel
First part of the small intestine; measures
12 inches long
Act of removal of materials from the body
Physical process of breaking up large fat
globules into smaller globules
Hard, outermost layer of a tooth
Copyright © 2014, 2011, 2007 by Saunders, an imprint of Elsevier Inc. 40
Vocabulary (cont’d)
• enzyme
• esophagus
• fatty acids
• feces
Chemical that speeds up reactions between
substances; enzyme names end in –ase
Tube connecting the throat to the stomach
Substances produced when fats are digested;
a category of lipids
Solid wastes; stool
Copyright © 2014, 2011, 2007 by Saunders, an imprint of Elsevier Inc. 41
Vocabulary (cont’d)
• gallbladder
• glucose
• glycogen
• hydrochloric acid
Small sac under the liver; stores bile
Simple sugar
Starch; glucose is stored in the form of
glycogen in liver cells
Substance produced by the stomach;
necessary for digestion of food
Copyright © 2014, 2011, 2007 by Saunders, an imprint of Elsevier Inc. 42
Vocabulary (cont’d)
• ileum
• incisor
• insulin
• jejunum
Third part of the small intestine
One of four front teeth in the dental arch
Hormone produced by endocrine cells of the
pancreas; transports sugar from the blood into
cells and stimulates glycogen formation by the
liver
Second part of the small intestine
Copyright © 2014, 2011, 2007 by Saunders, an imprint of Elsevier Inc. 43
Vocabulary (cont’d)
• lipase
• liver
• lower esophageal
sphincter (LES)
Pancreatic enzyme needed to digest fats
Large organ located in the RUQ of the
abdomen; secretes bile; stores sugar,
iron, and vitamins; produces blood
proteins; destroys worn-out RBCs; filters
out toxins; normal adult liver weighs
about 2 ½ to 3 pounds
Ring of muscles between the esophagus
and stomach; cardiac sphincter
Copyright © 2014, 2011, 2007 by Saunders, an imprint of Elsevier Inc. 44
Vocabulary (cont’d)
• mastication
• molar teeth
• palate
• pancreas
Chewing
Sixth, seventh, and eighth teeth from the
middle on either side of the dental arch
Roof of the mouth
Organ under the stomach; produces insulin
and enzymes
Copyright © 2014, 2011, 2007 by Saunders, an imprint of Elsevier Inc. 45
Vocabulary (cont’d)
• papillae (singular:
papilla)
• parotid gland
• peristalsis
• pharynx
Small, nipple-like elevations on the tongue
Salivary gland within the cheek, just
anterior to the ear
Rhythmic contractions of the tubular
organs
Throat, the common passageway for food
from the mouth and for air from the nose
Copyright © 2014, 2011, 2007 by Saunders, an imprint of Elsevier Inc. 46
Vocabulary (cont’d)
• portal vein
• protease
• pulp
• pyloric sphincter
Large vein bringing blood to the liver from
the intestines
Enzyme that digests protein
Soft tissue within a tooth, containing nerves
and blood vessels
Ring of muscle at the end of the stomach,
near the duodenum; opens when a wave of
peristalsis passes over it
Copyright © 2014, 2011, 2007 by Saunders, an imprint of Elsevier Inc. 47
Vocabulary (cont’d)
• pylorus
• rectum
• rugae
• saliva
Distal region of the stomach, opening to the
duodenum
Last section of the large intestine, connecting the
end of the colon and the anus
Ridges on the hard palate and the wall of the
stomach
Digestive juice produced by salivary glands; contains
the enzyme amylase
Copyright © 2014, 2011, 2007 by Saunders, an imprint of Elsevier Inc. 48
Vocabulary (cont’d)
• salivary glands
• sigmoid colon
• sphincter
• stomach
Parotid, sublingual, and submandibular
glands
Fourth and last, S-shaped segment of the
colon, just before the rectum; empties into
the rectum
Circular ring of muscle that constricts a
passage or closes a natural opening
Muscular organ that receives food from the
esophagus
Copyright © 2014, 2011, 2007 by Saunders, an imprint of Elsevier Inc. 49
Vocabulary (cont’d)
• triglycerides
• uvula
• villi (singular:
villus)
Fat molecules composed of three parts
fatty acids and one part glycerol; subgroup
of lipids
Soft tissue hanging from the middle of the
soft palate
Microscopic projections in the wall of the
small intestine that absorb nutrients into
the bloodstream
Copyright © 2014, 2011, 2007 by Saunders, an imprint of Elsevier Inc. 50
Terminology – Combining Forms
Parts of the Body
• an/o
• append/o, appendic/o
• bucc/o
• cec/o
• celi/o
• cheil/o
• cholecyst/o
• choledoch/o
anus
appendix
cheek
cecum
belly,abdomen
lip
gallbladder
common bile duct
Combining FormCombining Form MeaningMeaning
Copyright © 2014, 2011, 2007 by Saunders, an imprint of Elsevier Inc. 51
Terminology – Combining Forms
Parts of the Body (cont’d)
• col/o colon
• colon/o colon
• dent/i tooth
• duoden/o duodenum
• enter/o intestines, usually small intestine
• esophag/o esophagus
• faci/o face
• gastr/o stomach
• gingiv/o gums
Combining FormCombining Form MeaningMeaning
Copyright © 2014, 2011, 2007 by Saunders, an imprint of Elsevier Inc. 52
Terminology – Combining Forms
Parts of the Body (cont’d)
• gloss/o tongue
• hepat/o liver
• ile/o ileum
• jejun/o jejunum
• labi/o lip
• lapar/o abdomen
• lingu/o tongue
• mandibul/o lower jaw, mandible
• odont/o tooth
Combining FormCombining Form MeaningMeaning
Copyright © 2014, 2011, 2007 by Saunders, an imprint of Elsevier Inc. 53
Terminology – Combining Forms
Parts of the Body (cont’d)
• or/o mouth
• palat/o palate
• pancreat/o pancreas
• peritone/o peritoneum
• pharyng/o throat
• proct/o anus and rectum
• pylor/o pyloric sphincter
• rect/o rectum
• sialaden/o salivary gland
Combining FormCombining Form MeaningMeaning
Copyright © 2014, 2011, 2007 by Saunders, an imprint of Elsevier Inc. 54
Terminology – Combining Forms
Parts of the Body (cont’d)
• sigmoid/o sigmoid colon
• stomat/o mouth
• uvul/o uvula
Combining FormCombining Form MeaningMeaning
Copyright © 2014, 2011, 2007 by Saunders, an imprint of Elsevier Inc. 55
Terminology – Combining Forms
Substances
• amyl/o starch
• bil/i gall, bile
• bilirubin/o bilirubin (bile pigment)
• chol/e gall or bile
• chlorhydr/o hydrochloric acid
• gluc/o sugar
• glyc/o sugar
Combining FormCombining Form MeaningMeaning
Copyright © 2014, 2011, 2007 by Saunders, an imprint of Elsevier Inc. 56
Terminology – Combining Forms
Substances (cont’d)
• glycogen/o glycogen, animal starch
• lip/o fat
• lith/o stone
• prote/o protein
• py/o pus
• sial/o saliva, salivary
• steat/o fat
Combining FormCombining Form MeaningMeaning
Copyright © 2014, 2011, 2007 by Saunders, an imprint of Elsevier Inc. 57
Terminology – Suffixes
• -ase enzyme
• -chezia defecation, elimination of
wastes
• -iasis abnormal condition
• -prandial meal
SuffixSuffix MeaningMeaning
Copyright © 2014, 2011, 2007 by Saunders, an imprint of Elsevier Inc. 58
Combining Forms, Suffixes,
and Terminology (cont’d)
Three types of anastomoses
Copyright © 2014, 2011, 2007 by Saunders, an imprint of Elsevier Inc. 59
QUICK QUIZ:
4. Which term means inflammation of the lip?
A. Cholecystitis
B. Celiac
C. Appendicitis
D. Cheilitis
Copyright © 2014, 2011, 2007 by Saunders, an imprint of Elsevier Inc. 60
Chapter 5
Lesson 5.2
Copyright © 2014, 2011, 2007 by Saunders, an imprint of Elsevier Inc. 61
Pathology
of the Digestive System
Signs and symptoms
• Anorexia – lack of appetite
• Ascites – abnormal accumulation of fluid in
the abdomen
• Borborygmus (plural: borborygmi) – rumbling
or gurgling noise produced by the movement
of gas, fluid, or both in the GI tract
• Constipation – difficulty in passing stools
• Diarrhea – frequent passage of loose, watery
stools
Copyright © 2014, 2011, 2007 by Saunders, an imprint of Elsevier Inc. 62
Pathology
of the Digestive System (cont’d)
• Dysphagia – difficulty in swallowing
• Eructation – gas expelled from the stomach
through the mouth
• Flatus – gas expelled through the anus
• Hematochezia – passage of fresh, bright red
blood from the rectum
• Jaundice (icterus) – yellow-orange coloration
of the skin and whites of the eyes caused by
high levels of bilirubin in the blood
Copyright © 2014, 2011, 2007 by Saunders, an imprint of Elsevier Inc. 63
Pathology
of the Digestive System (cont’d)
• Melena – black, tarry stools; feces containing
digested blood
• Nausea – unpleasant sensation in the stomach
associated with a tendency to vomit
• Steatorrhea – fat in the feces; frothy, foul-
smelling fecal matter
Copyright © 2014, 2011, 2007 by Saunders, an imprint of Elsevier Inc. 64
Pathologic Conditions
Oral Cavity and Teeth
• Aphthous stomatitis – inflammation of the
mouth with small, painful ulcers
• Dental caries – tooth decay
• Herpetic stomatitis – inflammation of the mouth
by infection with the herpes virus
• Oral leukoplakia – white plaques or patches
• Periodontal disease – inflammation and
degeneration of the gums, teeth and surrounding
bone
Copyright © 2014, 2011, 2007 by Saunders, an imprint of Elsevier Inc. 65
Pathologic Conditions
Upper Gastrointestinal Tract
• Achalasia – failure of the lower
esophagus sphincter (LES) muscle to
relax
Copyright © 2014, 2011, 2007 by Saunders, an imprint of Elsevier Inc. 66
Pathologic Conditions
Upper Gastrointestinal Tract
• Esophageal cancer – malignant tumor of the
esophagus
• Esophageal varices – swollen, varicose veins
at the lower end of the esophagus
• Gastric carcinoma – malignant tumor of the
stomach
Copyright © 2014, 2011, 2007 by Saunders, an imprint of Elsevier Inc. 67
Pathologic Conditions
Upper Gastrointestinal Tract
Copyright © 2014, 2011, 2007 by Saunders, an imprint of Elsevier Inc. 68
Pathologic Conditions
Upper Gastrointestinal Tract (cont’d)
• Gastroesophageal reflux disease
(GERD) – solids and fluids return to
the mouth from the stomach
• Peptic ulcer – open sore or lesion
of the mucous membrane of the
stomach or duodenum
Copyright © 2014, 2011, 2007 by Saunders, an imprint of Elsevier Inc. 69
Pathologic Conditions
Upper Gastrointestinal Tract (cont’d)
• Hernia – protrusion of an organ or
part through the muscle normally
containing it
Copyright © 2014, 2011, 2007 by Saunders, an imprint of Elsevier Inc. 70
Pathologic Conditions
Lower Gastrointestinal Tract
Small and Large Intestines
• Anal fistula – abnormal tube-like
passageway near the anus
• Colonic polyposis – polyps protrude
from the mucous membrane of the
colon
Copyright © 2014, 2011, 2007 by Saunders, an imprint of Elsevier Inc. 71
Pathologic Conditions
Lower Gastrointestinal Tract
Small and Large Intestines (cont’d)
• Colorectal cancer – adenocarcinoma of
the colon or rectum or both
Copyright © 2014, 2011, 2007 by Saunders, an imprint of Elsevier Inc. 72
Pathologic Conditions
Lower Gastrointestinal Tract
Small and Large Intestines (cont’d)
• Crohn disease – chronic inflammation of the
intestinal tract
• Diverticulosis – abnormal side pockets
(outpouchings) in the intestinal wall
Copyright © 2014, 2011, 2007 by Saunders, an imprint of Elsevier Inc. 73
Pathologic Conditions
Lower Gastrointestinal Tract
Small and Large Intestines (cont’d)
• Dysentery – painful, inflamed intestines
• Hemorrhoids – swollen, twisted, varicose
veins in the rectal region
• Ileus – failure of peristalsis with resulting
obstruction of the intestines
• Inflammatory bowel disease (IBD) –
inflammation of the colon and small
intestine
Copyright © 2014, 2011, 2007 by Saunders, an imprint of Elsevier Inc. 74
Pathologic Conditions
Lower Gastrointestinal Tract
Small and Large Intestines (cont’d)
• Intussusception – telescoping of the
intestines
• IBS – irritable bowel syndrome – group of
gastrointestinal symptoms associated with
stress and tension
• Ulcerative colitis – chronic inflammation of
the colon with the presence of ulcers
• Volvulus – twisting of the intestines on
itself
Copyright © 2014, 2011, 2007 by Saunders, an imprint of Elsevier Inc. 75
Pathologic Conditions
Liver, Gallbladder, and Pancreas
• Cirrhosis – chronic degenerative disease of the
liver
• Pancreatic cancer – malignant tumor of the
pancreas
• Pancreatitis – inflammation of the pancreas
• Viral hepatitis – inflammation of the liver
caused by a virus
Copyright © 2014, 2011, 2007 by Saunders, an imprint of Elsevier Inc. 76
Pathologic Conditions
Liver Gallbladder, and Pancreas (cont’d)
• Cholelithiasis – gallstones in the gallbladder

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Medical Terminology Chapter 5

  • 1. Copyright © 2014, 2011, 2007 by Saunders, an imprint of Elsevier Inc. 1 The Language OfThe Language Of MedicineMedicine 1010thth editionedition Davi-Ellen ChabnerDavi-Ellen Chabner
  • 2. Chapter 5 Digestive System Copyright © 2014, 2011, 2007 by Saunders, an imprint of Elsevier Inc. 2
  • 3. Copyright © 2014, 2011, 2007 by Saunders, an imprint of Elsevier Inc. 3 Chapter Goals • Name the organs of the digestive system and describe their locations and functions. • Define combining forms for organs and know the meaning of related terminology. • Describe signs, symptoms, and disease conditions affecting the digestive system.
  • 4. Copyright © 2014, 2011, 2007 by Saunders, an imprint of Elsevier Inc. 4 Chapter 5 Lesson 5.1
  • 5. Copyright © 2014, 2011, 2007 by Saunders, an imprint of Elsevier Inc. 5 Introduction The digestive or gastrointestinal system performs four main functions: • ingestion • digestion • absorption • elimination
  • 6. Copyright © 2014, 2011, 2007 by Saunders, an imprint of Elsevier Inc. 6 Introduction: Ingestion and Digestion • Ingestion—food material taken into mouth • Digestion—food is broken down, mechanically and chemically, as it travels through the gastrointestinal tract. Digestive enzymes aid the breakdown of complex nutrients. • Proteins → amino acids • Sugars → glucose • Fats → fatty acids or triglycerides
  • 7. Copyright © 2014, 2011, 2007 by Saunders, an imprint of Elsevier Inc. 7 Introduction: Absorption • Digested food passes into the bloodstream through lining cells of the small intestine. • Nutrients travel to all cells of the body. • Cells burn nutrients to release the energy stored in food.
  • 8. Copyright © 2014, 2011, 2007 by Saunders, an imprint of Elsevier Inc. 8 Introduction: Elimination • The body eliminates solid waste materials that cannot be absorbed into bloodstream. • The large intestine concentrates feces. • The wastes pass out of the body through the anus.
  • 9. Copyright © 2014, 2011, 2007 by Saunders, an imprint of Elsevier Inc. 9 Organs of the Digestive System • The gastrointestinal tract begins with the oral cavity.
  • 10. Copyright © 2014, 2011, 2007 by Saunders, an imprint of Elsevier Inc. 10 Oral Cavity Major parts of the oral cavity
  • 11. Copyright © 2014, 2011, 2007 by Saunders, an imprint of Elsevier Inc. 11 Oral Cavity (cont’d) Major parts of the oral cavity
  • 12. Copyright © 2014, 2011, 2007 by Saunders, an imprint of Elsevier Inc. 12 Oral Cavity (cont’d) Upper permanent teeth within the dental arch →
  • 13. Copyright © 2014, 2011, 2007 by Saunders, an imprint of Elsevier Inc. 13 Oral Cavity (cont’d) Upper permanent teeth within the dental arch
  • 14. Copyright © 2014, 2011, 2007 by Saunders, an imprint of Elsevier Inc. 14 Oral Cavity (cont’d) Anatomy of a tooth
  • 15. Copyright © 2014, 2011, 2007 by Saunders, an imprint of Elsevier Inc. 15 Oral Cavity (cont’d) Anatomy of a tooth
  • 16. Copyright © 2014, 2011, 2007 by Saunders, an imprint of Elsevier Inc. 16 Oral Cavity (cont’d) Salivary glands
  • 17. Copyright © 2014, 2011, 2007 by Saunders, an imprint of Elsevier Inc. 17 Pharynx Deglutition
  • 18. Copyright © 2014, 2011, 2007 by Saunders, an imprint of Elsevier Inc. 18 Pharynx (cont’d) Deglutition
  • 19. Copyright © 2014, 2011, 2007 by Saunders, an imprint of Elsevier Inc. 19 Esophagus/Stomach Parts of the stomach
  • 20. Copyright © 2014, 2011, 2007 by Saunders, an imprint of Elsevier Inc. 20 Esophagus/Stomach (cont’d) Parts of the stomach
  • 21. Copyright © 2014, 2011, 2007 by Saunders, an imprint of Elsevier Inc. 21 The Digestive Tract
  • 22. Copyright © 2014, 2011, 2007 by Saunders, an imprint of Elsevier Inc. 22 The Digestive Tract (cont’d)
  • 23. Copyright © 2014, 2011, 2007 by Saunders, an imprint of Elsevier Inc. 23 Small Intestine Villi in the lining of the small intestine
  • 24. Copyright © 2014, 2011, 2007 by Saunders, an imprint of Elsevier Inc. 24 Large Intestine Parts of the large intestine
  • 25. Copyright © 2014, 2011, 2007 by Saunders, an imprint of Elsevier Inc. 25 Large Intestine (cont’d) Parts of the large intestine
  • 26. Copyright © 2014, 2011, 2007 by Saunders, an imprint of Elsevier Inc. 26 Liver, Gallbladder, and Pancreas Parts of the liver, gallbladder, and pancreas
  • 27. Copyright © 2014, 2011, 2007 by Saunders, an imprint of Elsevier Inc. 27 Liver, Gallbladder, and Pancreas (cont’d) Parts of the liver, gallbladder, and pancreas
  • 28. Copyright © 2014, 2011, 2007 by Saunders, an imprint of Elsevier Inc. 28 Liver, Gallbladder, and Pancreas (cont’d) Besides producing bile, the liver: • Helps maintain normal blood glucose levels • Manufactures blood proteins necessary for clotting • Releases bilirubin, a pigment in bile • Removes toxins and poisons from the blood
  • 29. Copyright © 2014, 2011, 2007 by Saunders, an imprint of Elsevier Inc. 29 QUICK QUIZ: 1. What happens if bilirubin cannot leave the body and remains in the bloodstream? A. Gluconeogenesis B. Emulsification C. Hyperbilirubinemia D. Glycogenolysis
  • 30. Copyright © 2014, 2011, 2007 by Saunders, an imprint of Elsevier Inc. 30 Liver, Gallbladder, and Pancreas The pancreas and its functions
  • 31. Copyright © 2014, 2011, 2007 by Saunders, an imprint of Elsevier Inc. 31 Food Pathway through the GI Tract Food enters through the oral cavity and exits through the anus
  • 32. Copyright © 2014, 2011, 2007 by Saunders, an imprint of Elsevier Inc. 32 Food Pathway through the GI Tract (cont’d) Food enters through the oral cavity and exits through the anus
  • 33. Copyright © 2014, 2011, 2007 by Saunders, an imprint of Elsevier Inc. 33 QUICK QUIZ: 2. Which term is the first part of the large intestine? A. Cecum B. Duodenum C. Jejunum D. Pylorus
  • 34. Copyright © 2014, 2011, 2007 by Saunders, an imprint of Elsevier Inc. 34 QUICK QUIZ: (cont’d) 3. Which term means swallowing? A. Mastication B. Deglutition C. Emulsification D. Peristalsis
  • 35. Copyright © 2014, 2011, 2007 by Saunders, an imprint of Elsevier Inc. 35 Vocabulary • absorption • amino acids • amylase • anus Passage of materials through the walls of the small intestine into the bloodstream Small building blocks of proteins; released when proteins are digested Enzyme secreted by the pancreas and salivary glands to digest starch Terminal end or opening of the digestive tract to the outside of body
  • 36. Copyright © 2014, 2011, 2007 by Saunders, an imprint of Elsevier Inc. 36 Vocabulary (cont’d) • appendix • bile • bilirubin • bowel Blind pouch hanging from the cecum Digestive juice made in the liver and stored in the gallbladder; breaks up large fat globules; composed of bile pigments, cholesterol, and bile salts Pigment released by the liver in bile Intestine
  • 37. Copyright © 2014, 2011, 2007 by Saunders, an imprint of Elsevier Inc. 37 Vocabulary (cont’d) • canine teeth • cecum • colon • common bile duct Pointed, dog-like teeth next to the incisors; also called cuspids or eyeteeth First part of the large intestine Consists of the ascending, transverse, descending, and sigmoid segments Carries bile from the liver and gallbladder to the duodenum; also called the choledochus
  • 38. Copyright © 2014, 2011, 2007 by Saunders, an imprint of Elsevier Inc. 38 Vocabulary (cont’d) • defecation • deglutition • dentin • digestion Elimination of feces from the digestive tract through the anus Swallowing Primary material found in teeth; covered by the enamel in the crown and a protective layer of cementum in the root Breakdown of complex foods to simpler forms
  • 39. Copyright © 2014, 2011, 2007 by Saunders, an imprint of Elsevier Inc. 39 Vocabulary (cont’d) • duodenum • elimination • emulsification • enamel First part of the small intestine; measures 12 inches long Act of removal of materials from the body Physical process of breaking up large fat globules into smaller globules Hard, outermost layer of a tooth
  • 40. Copyright © 2014, 2011, 2007 by Saunders, an imprint of Elsevier Inc. 40 Vocabulary (cont’d) • enzyme • esophagus • fatty acids • feces Chemical that speeds up reactions between substances; enzyme names end in –ase Tube connecting the throat to the stomach Substances produced when fats are digested; a category of lipids Solid wastes; stool
  • 41. Copyright © 2014, 2011, 2007 by Saunders, an imprint of Elsevier Inc. 41 Vocabulary (cont’d) • gallbladder • glucose • glycogen • hydrochloric acid Small sac under the liver; stores bile Simple sugar Starch; glucose is stored in the form of glycogen in liver cells Substance produced by the stomach; necessary for digestion of food
  • 42. Copyright © 2014, 2011, 2007 by Saunders, an imprint of Elsevier Inc. 42 Vocabulary (cont’d) • ileum • incisor • insulin • jejunum Third part of the small intestine One of four front teeth in the dental arch Hormone produced by endocrine cells of the pancreas; transports sugar from the blood into cells and stimulates glycogen formation by the liver Second part of the small intestine
  • 43. Copyright © 2014, 2011, 2007 by Saunders, an imprint of Elsevier Inc. 43 Vocabulary (cont’d) • lipase • liver • lower esophageal sphincter (LES) Pancreatic enzyme needed to digest fats Large organ located in the RUQ of the abdomen; secretes bile; stores sugar, iron, and vitamins; produces blood proteins; destroys worn-out RBCs; filters out toxins; normal adult liver weighs about 2 ½ to 3 pounds Ring of muscles between the esophagus and stomach; cardiac sphincter
  • 44. Copyright © 2014, 2011, 2007 by Saunders, an imprint of Elsevier Inc. 44 Vocabulary (cont’d) • mastication • molar teeth • palate • pancreas Chewing Sixth, seventh, and eighth teeth from the middle on either side of the dental arch Roof of the mouth Organ under the stomach; produces insulin and enzymes
  • 45. Copyright © 2014, 2011, 2007 by Saunders, an imprint of Elsevier Inc. 45 Vocabulary (cont’d) • papillae (singular: papilla) • parotid gland • peristalsis • pharynx Small, nipple-like elevations on the tongue Salivary gland within the cheek, just anterior to the ear Rhythmic contractions of the tubular organs Throat, the common passageway for food from the mouth and for air from the nose
  • 46. Copyright © 2014, 2011, 2007 by Saunders, an imprint of Elsevier Inc. 46 Vocabulary (cont’d) • portal vein • protease • pulp • pyloric sphincter Large vein bringing blood to the liver from the intestines Enzyme that digests protein Soft tissue within a tooth, containing nerves and blood vessels Ring of muscle at the end of the stomach, near the duodenum; opens when a wave of peristalsis passes over it
  • 47. Copyright © 2014, 2011, 2007 by Saunders, an imprint of Elsevier Inc. 47 Vocabulary (cont’d) • pylorus • rectum • rugae • saliva Distal region of the stomach, opening to the duodenum Last section of the large intestine, connecting the end of the colon and the anus Ridges on the hard palate and the wall of the stomach Digestive juice produced by salivary glands; contains the enzyme amylase
  • 48. Copyright © 2014, 2011, 2007 by Saunders, an imprint of Elsevier Inc. 48 Vocabulary (cont’d) • salivary glands • sigmoid colon • sphincter • stomach Parotid, sublingual, and submandibular glands Fourth and last, S-shaped segment of the colon, just before the rectum; empties into the rectum Circular ring of muscle that constricts a passage or closes a natural opening Muscular organ that receives food from the esophagus
  • 49. Copyright © 2014, 2011, 2007 by Saunders, an imprint of Elsevier Inc. 49 Vocabulary (cont’d) • triglycerides • uvula • villi (singular: villus) Fat molecules composed of three parts fatty acids and one part glycerol; subgroup of lipids Soft tissue hanging from the middle of the soft palate Microscopic projections in the wall of the small intestine that absorb nutrients into the bloodstream
  • 50. Copyright © 2014, 2011, 2007 by Saunders, an imprint of Elsevier Inc. 50 Terminology – Combining Forms Parts of the Body • an/o • append/o, appendic/o • bucc/o • cec/o • celi/o • cheil/o • cholecyst/o • choledoch/o anus appendix cheek cecum belly,abdomen lip gallbladder common bile duct Combining FormCombining Form MeaningMeaning
  • 51. Copyright © 2014, 2011, 2007 by Saunders, an imprint of Elsevier Inc. 51 Terminology – Combining Forms Parts of the Body (cont’d) • col/o colon • colon/o colon • dent/i tooth • duoden/o duodenum • enter/o intestines, usually small intestine • esophag/o esophagus • faci/o face • gastr/o stomach • gingiv/o gums Combining FormCombining Form MeaningMeaning
  • 52. Copyright © 2014, 2011, 2007 by Saunders, an imprint of Elsevier Inc. 52 Terminology – Combining Forms Parts of the Body (cont’d) • gloss/o tongue • hepat/o liver • ile/o ileum • jejun/o jejunum • labi/o lip • lapar/o abdomen • lingu/o tongue • mandibul/o lower jaw, mandible • odont/o tooth Combining FormCombining Form MeaningMeaning
  • 53. Copyright © 2014, 2011, 2007 by Saunders, an imprint of Elsevier Inc. 53 Terminology – Combining Forms Parts of the Body (cont’d) • or/o mouth • palat/o palate • pancreat/o pancreas • peritone/o peritoneum • pharyng/o throat • proct/o anus and rectum • pylor/o pyloric sphincter • rect/o rectum • sialaden/o salivary gland Combining FormCombining Form MeaningMeaning
  • 54. Copyright © 2014, 2011, 2007 by Saunders, an imprint of Elsevier Inc. 54 Terminology – Combining Forms Parts of the Body (cont’d) • sigmoid/o sigmoid colon • stomat/o mouth • uvul/o uvula Combining FormCombining Form MeaningMeaning
  • 55. Copyright © 2014, 2011, 2007 by Saunders, an imprint of Elsevier Inc. 55 Terminology – Combining Forms Substances • amyl/o starch • bil/i gall, bile • bilirubin/o bilirubin (bile pigment) • chol/e gall or bile • chlorhydr/o hydrochloric acid • gluc/o sugar • glyc/o sugar Combining FormCombining Form MeaningMeaning
  • 56. Copyright © 2014, 2011, 2007 by Saunders, an imprint of Elsevier Inc. 56 Terminology – Combining Forms Substances (cont’d) • glycogen/o glycogen, animal starch • lip/o fat • lith/o stone • prote/o protein • py/o pus • sial/o saliva, salivary • steat/o fat Combining FormCombining Form MeaningMeaning
  • 57. Copyright © 2014, 2011, 2007 by Saunders, an imprint of Elsevier Inc. 57 Terminology – Suffixes • -ase enzyme • -chezia defecation, elimination of wastes • -iasis abnormal condition • -prandial meal SuffixSuffix MeaningMeaning
  • 58. Copyright © 2014, 2011, 2007 by Saunders, an imprint of Elsevier Inc. 58 Combining Forms, Suffixes, and Terminology (cont’d) Three types of anastomoses
  • 59. Copyright © 2014, 2011, 2007 by Saunders, an imprint of Elsevier Inc. 59 QUICK QUIZ: 4. Which term means inflammation of the lip? A. Cholecystitis B. Celiac C. Appendicitis D. Cheilitis
  • 60. Copyright © 2014, 2011, 2007 by Saunders, an imprint of Elsevier Inc. 60 Chapter 5 Lesson 5.2
  • 61. Copyright © 2014, 2011, 2007 by Saunders, an imprint of Elsevier Inc. 61 Pathology of the Digestive System Signs and symptoms • Anorexia – lack of appetite • Ascites – abnormal accumulation of fluid in the abdomen • Borborygmus (plural: borborygmi) – rumbling or gurgling noise produced by the movement of gas, fluid, or both in the GI tract • Constipation – difficulty in passing stools • Diarrhea – frequent passage of loose, watery stools
  • 62. Copyright © 2014, 2011, 2007 by Saunders, an imprint of Elsevier Inc. 62 Pathology of the Digestive System (cont’d) • Dysphagia – difficulty in swallowing • Eructation – gas expelled from the stomach through the mouth • Flatus – gas expelled through the anus • Hematochezia – passage of fresh, bright red blood from the rectum • Jaundice (icterus) – yellow-orange coloration of the skin and whites of the eyes caused by high levels of bilirubin in the blood
  • 63. Copyright © 2014, 2011, 2007 by Saunders, an imprint of Elsevier Inc. 63 Pathology of the Digestive System (cont’d) • Melena – black, tarry stools; feces containing digested blood • Nausea – unpleasant sensation in the stomach associated with a tendency to vomit • Steatorrhea – fat in the feces; frothy, foul- smelling fecal matter
  • 64. Copyright © 2014, 2011, 2007 by Saunders, an imprint of Elsevier Inc. 64 Pathologic Conditions Oral Cavity and Teeth • Aphthous stomatitis – inflammation of the mouth with small, painful ulcers • Dental caries – tooth decay • Herpetic stomatitis – inflammation of the mouth by infection with the herpes virus • Oral leukoplakia – white plaques or patches • Periodontal disease – inflammation and degeneration of the gums, teeth and surrounding bone
  • 65. Copyright © 2014, 2011, 2007 by Saunders, an imprint of Elsevier Inc. 65 Pathologic Conditions Upper Gastrointestinal Tract • Achalasia – failure of the lower esophagus sphincter (LES) muscle to relax
  • 66. Copyright © 2014, 2011, 2007 by Saunders, an imprint of Elsevier Inc. 66 Pathologic Conditions Upper Gastrointestinal Tract • Esophageal cancer – malignant tumor of the esophagus • Esophageal varices – swollen, varicose veins at the lower end of the esophagus • Gastric carcinoma – malignant tumor of the stomach
  • 67. Copyright © 2014, 2011, 2007 by Saunders, an imprint of Elsevier Inc. 67 Pathologic Conditions Upper Gastrointestinal Tract
  • 68. Copyright © 2014, 2011, 2007 by Saunders, an imprint of Elsevier Inc. 68 Pathologic Conditions Upper Gastrointestinal Tract (cont’d) • Gastroesophageal reflux disease (GERD) – solids and fluids return to the mouth from the stomach • Peptic ulcer – open sore or lesion of the mucous membrane of the stomach or duodenum
  • 69. Copyright © 2014, 2011, 2007 by Saunders, an imprint of Elsevier Inc. 69 Pathologic Conditions Upper Gastrointestinal Tract (cont’d) • Hernia – protrusion of an organ or part through the muscle normally containing it
  • 70. Copyright © 2014, 2011, 2007 by Saunders, an imprint of Elsevier Inc. 70 Pathologic Conditions Lower Gastrointestinal Tract Small and Large Intestines • Anal fistula – abnormal tube-like passageway near the anus • Colonic polyposis – polyps protrude from the mucous membrane of the colon
  • 71. Copyright © 2014, 2011, 2007 by Saunders, an imprint of Elsevier Inc. 71 Pathologic Conditions Lower Gastrointestinal Tract Small and Large Intestines (cont’d) • Colorectal cancer – adenocarcinoma of the colon or rectum or both
  • 72. Copyright © 2014, 2011, 2007 by Saunders, an imprint of Elsevier Inc. 72 Pathologic Conditions Lower Gastrointestinal Tract Small and Large Intestines (cont’d) • Crohn disease – chronic inflammation of the intestinal tract • Diverticulosis – abnormal side pockets (outpouchings) in the intestinal wall
  • 73. Copyright © 2014, 2011, 2007 by Saunders, an imprint of Elsevier Inc. 73 Pathologic Conditions Lower Gastrointestinal Tract Small and Large Intestines (cont’d) • Dysentery – painful, inflamed intestines • Hemorrhoids – swollen, twisted, varicose veins in the rectal region • Ileus – failure of peristalsis with resulting obstruction of the intestines • Inflammatory bowel disease (IBD) – inflammation of the colon and small intestine
  • 74. Copyright © 2014, 2011, 2007 by Saunders, an imprint of Elsevier Inc. 74 Pathologic Conditions Lower Gastrointestinal Tract Small and Large Intestines (cont’d) • Intussusception – telescoping of the intestines • IBS – irritable bowel syndrome – group of gastrointestinal symptoms associated with stress and tension • Ulcerative colitis – chronic inflammation of the colon with the presence of ulcers • Volvulus – twisting of the intestines on itself
  • 75. Copyright © 2014, 2011, 2007 by Saunders, an imprint of Elsevier Inc. 75 Pathologic Conditions Liver, Gallbladder, and Pancreas • Cirrhosis – chronic degenerative disease of the liver • Pancreatic cancer – malignant tumor of the pancreas • Pancreatitis – inflammation of the pancreas • Viral hepatitis – inflammation of the liver caused by a virus
  • 76. Copyright © 2014, 2011, 2007 by Saunders, an imprint of Elsevier Inc. 76 Pathologic Conditions Liver Gallbladder, and Pancreas (cont’d) • Cholelithiasis – gallstones in the gallbladder

Editor's Notes

  1. Define, discuss, and describe the three main functions of the digestive system. What are enzymes? What function do they serve in the digestive process?
  2. In which major systems of the digestive tract do digestion, absorption, and elimination occur?
  3. Quiz students to complete labels. What is mastication? What is deglutition?
  4. Have the students check their answers. What is mastication? What is deglutition?
  5. Quiz students to complete labels. Discuss the following terms: labial surface, buccal surface, facial surface, lingual surface, mesial surface, distal surface, occlusal surface, and incisal edge.
  6. Have the students check their answers. Discuss the following terms: labial surface, buccal surface, facial surface, lingual surface, mesial surface, distal surface, occlusal surface, and incisal edge.
  7. Quiz students to complete labels. What is a root canal? Why is it performed?
  8. Have the students check their answers. What is a root canal? Why is it performed?
  9. Quiz students to complete labels. How many salivary glands surround the oral cavity? How do salivary enzymes aid digestion?
  10. The pharynx is the common passageway for both air and food. What potential problems do you see with this arrangement? How does the body address this problem?
  11. The pharynx is the common passageway for both air and food. What potential problems do you see with this arrangement? How does the body address this problem?
  12. The esophagus is a 9- or 10-inch muscular tube that extends from the pharynx to the stomach. What is a bolus? How does the esophagus move the bolus toward the stomach? What are the three parts of the stomach and what are their functions?
  13. The esophagus is a 9- or 10-inch muscular tube that extends from the pharynx to the stomach. What is a bolus? How does the esophagus move the bolus toward the stomach? What are the three parts of the stomach and what are their functions?
  14. Quiz students to complete labels. What is the name of the pigment produced from the breakdown of hemoglobin during red blood cell destruction?
  15. Have the students check their answers. What is the name of the pigment produced from the breakdown of hemoglobin during red blood cell destruction?
  16. What is the function of the villi?
  17. Also known as the colon. The large intestine extends from the end of the ileum to the anus. The large intestine receives the fluid waste from digestion and stores it until it can be released from the body. What are the three sections of the colon and what are their functions?
  18. Also known as the colon. The large intestine extends from the end of the ileum to the anus. The large intestine receives the fluid waste from digestion and stores it until it can be released from the body. What are the three sections of the colon and what are their functions?
  19. Quiz students to complete the labels in this figure. What is emulsification?
  20. Have the students check their answers. What is emulsification?
  21. How does the liver maintain blood glucose levels?
  22. The correct answer is C: hyperbilirubinemia (jaundice). Hyperbilirubinemia can show yellow discoloration of the skin, whites of the eyes, and mucous membranes.
  23. The pancreas is both an exocrine and endocrine organ. As an exocrine organ, it produces enzymes to digest starch (amylase), fat (lipase), and proteins (protease). As an endocrine organ it secretes insulin. What is the function of insulin?
  24. Quiz students by having them complete the flow chart of how food progresses through the GI tract.
  25. The correct answer is A: the cecum.
  26. The correct answer is B: deglutition.
  27. Define combining forms for organs and the meanings of related terminology using these word parts. Name two medical terms (not mentioned above) from the word forms listed.
  28. Define combining forms for organs and the meanings of related terminology using these word parts. Name two medical terms (not mentioned above) from the word forms listed.
  29. Define combining forms for organs and the meanings of related terminology using these word parts. Name two medical terms (not mentioned above) from the word forms listed.
  30. Define combining forms for organs and the meanings of related terminology using these word parts. Name two medical terms (not mentioned above) from the word forms listed.
  31. Define combining forms for organs and the meanings of related terminology using these word parts. Name two medical terms (not mentioned above) from the word forms listed.
  32. Define suffixes for organs and the meanings of related terminology using these word parts.
  33. When -stomy is used with two or more combining forms for organs, it means the surgical creation of an opening between those organs inside the body. Anastomosis is the surgical connection between two body parts such as vessels, ducts, or bowel segments. In what other places might anastomoses be made?
  34. The correct answer is D: cheilitis.
  35. Discuss symptoms such as ascites, borborygmus, constipation, diarrhea, dysphagia, flatus, hematochezia, jaundice, melena, and nausea. Based on your knowledge of the functions of the liver, how might cirrhosis cause ascites? For more signs and symptoms, see Chapter 5, Pathology Section.
  36. Discuss herpetic stomatitis, oral leukoplakia, and periodontal disease. How does tooth decay progress? How is it treated?
  37. What kind of diet do physicians recommend to relieve symptoms of achalasia?
  38. Discuss the following terms: gastroesophageal reflux disease, hernia, and peptic ulcer. What is a major risk factor for gastric carcinoma? How is it treated? LES is lower esophagus sphincter.
  39. Discuss the following terms: gastroesophageal reflux disease, hernia, and peptic ulcer.
  40. What causes cirrhosis of the liver?
  41. What is biliary colic? What type of surgery is performed to remove the gallbladder and stones?