Chapter 14 (9) - Digestive System Flashcards
3 Major Functions
- ) Digestion - Breaking down foods into nutrients which can be absorbed
- ) Absorption - Passing nutrients into blood stream (small intestine)
- ) Elimination - Liquid to solid; deification
Gastrointestinal Tract (GI)
- Mouth
- Salivary Glands
- Parotid - Pharynx
- Esophagus
- Stomach
- Liver, Gall Bladder, Pancreas
- Small Intestine
- Colon
- Rectum
- Anus
Small Intestine
- Duodenum
- Jejunum
- Ileum
Large Intestine
- Cecum
- Ascending Colon
- Transverse Colon
- Descending Colon
- Sigmoid Colon
- Rectum
Lumen
- Mucosa - Innermost layer; Secretes mucus/enzymes
- Submucosa - Connective Tissue; Strength and structure to wall
- Muscularis - Peristalsis (contraction)
- Serosa - Outer Covering
Enzymes; Chemical Digestion
Convert complex food molecules into smaller, simple molecules for absorption
Fat -> Lipase -> Fatty Acids
Protein -> Protease -> Amino Acids
Starch -> Amylase -> Sugars
(complex) -> (enzymes) -> (simple molecules)
Lips
Sense both temperature and texture
Tongue
Frenulum and Papillae
Deglutition
Swallowing
Lingual Tonsils
Back part of tongue
Palatine Tonsils
Normal tonsils
Posterior Pharyngeal Wall
Back of throat
Hard Palate
Top of mouth; Rugae
Soft Palate
Flexible muscular sheet that separates the nasopharynx from the rest of the pharynx
Soft posterior part of palate
Uvula
Downward cone shaped projection at the back of the soft palate; Directs food down
Gums
Sockets hold teeth
Salivary Glands
- Parotid - located inferior to the cheekbone
- Submandibular - located below the mandible
- Sublingual - located in the base of the mouth below the tongue
Digestion In The Mouth
- Salivary Glands
- Chemical Digestion
- Mechanical
Pharynx
Throat
- Muscle tube moves food into esophagus (about 5”)
Esophagus - Muscle Tube
Lower Sphincter
LES / Cardiac Sphincter
Peristalsis
Contraction in wavelike motions
Emesis
Vomiting
Stomach
- Fundus - 1st upper curvature, top of stomach
- Cardia - Where esophagus enters the stomach
- Body
- Pylorus
- Greater / Lesser Curvature - Greater is more surface / Lesser is less surface
Gastric Juices
- Pepsin - digest proteins
- HCL - Acid
- Mucus - to protect itself from acidic environment
Chyme
Chemical substance passed into Duodenum
- Out from stomach
Path of Small Intestine
- Duodenum - 10”, Chyme mixes with bile (fast digestion) Mixes with Pancreatic Juice (Protein and Starch digestion)
- Jejunum - 8ft long; digestion
- Ileum - Ileocecal Valve, enters large intestine
Mesentery
Membrane made of peritoneum
- Contains blood supply to the small and large intestine
- Attaches bowel to Dorsal abdominal wall
Absorption
Passage of nutrients from bowel lumen into bloodstream
Chyme
1-6hrs to move from stomach to colon
Colon
Cecum - 3 Openings:
Ileum - from small intestine
Appendix - Opening into appendix
Ascending Colon - up further to colon
Ascending Colon
Transverse Colon
Descending Colon
Sigmoid Colon
Rectum
Anus
Liver
Right upper quadrant
- Right and Left Lobes (right is much larger)
- Portal Triad
- Portal Vein (Blood from Intestines)
- Hepatic Artery (Fresh blood to liver)
- Bile Duct (Bile into intestine) - Metabolism
- Bile Production
Liver / Gallbladder Bile
Made in liver, stored and concentrated in Gallbladder
- Dissolves fats in small intestine (Emulsification)
- Secreted into Bile Duct
Pancreas
- Chyme mixes: Bile from liver and Pancreatic Juices
- Pancreatic Juices: Amylase, Lipase, Trypsin
- Pancreatic Duct meets CBD and empties into Duodenum
An(o)
Anus
Append (o)
Appendix
Bil (o)
Bili
Bile
Bucc (o)
Cheek
Cec (o)
Cecum
Celi (o)
Abdomen
Chol (e) / Cholo
Bile
Cholangi (o)
Bile Vessel
Cholecyst (o)
Gall Bladder
Choledoch (o)
Common bile duct
Col (o)
Colon
Duoden (o)
Duodenum
Enter (o)
Intestine
Esophago
Esophagus
Gastr (o)
Stomach
Gloss (o)
Tongue
Gluc (o)
Glucose
Glyc (o)
Sugar
Hepat (o)
Liver
Labi (o)
Lip
Lingu (o)
Tongue
Or (o)
Mouth
Proct (o)
Anus; Rectum
Sial (o)
Saliva; Salivary Gland
Sialadeno
Salivary Gland
Stomat (o)
Mouth
Buccostomatitis
Inflammation of cheek and mouth
Celiotomy
Opening (incision) into the abdomen (Laparotomy)
Cholangiorrhaphy
Surgical suturing of bile duct (bile vessel)
Choledochoplasty
Repair of “common bile duct”
Labial
Referring to lip
Proctodynia
Pain in or from the rectum
Sialoadenitis
Inflammation of salivary glands
Gastroma
Tumor of the stomach
Linguoid
Resembling a tongue
AST, ALT, SGOT, SGPT
Liver Enzymes
BM
Bowel Movement
EGD
Upper Endoscopy (Esophagus, Gastric, Duodenum)
IBD
Inflammatory Bowel Disease
IBS
Irritable Bowel Syndrome
NG
Nasal Gastric
NPO
Nothing by Mouth
TPN
Total Parenteral Nutrition
UGI (s)
Upper Gastrointestinal Series
GERD
Gastroesophageal Reflux Disease
Anorexia
Loss of appetite
Anorexia Nervosa
Severe eating disorder due to body image distortion (wish to be thin)
Bulimia
Binging and purging, estreme distortion of body image
Complication: Heart Failure, Hair Loss, Amenorrhea, Dental Caries, Death
Cheilitis
Inflammation of the lips (unusually at corner of mouth)
Glossitis
Inflammation of the tongue
Sialoadenitis
Salivary gland inflammation
Parotiditis
Parotid gland inflammation
Aphagia
Unable to swallow
Dysphagia
Difficulty swallowing
Esophageal Varices
Tortuous veins in the lower esophagus
- Secondary to elevated pressure in Portal Vein
- Common in liver failure
- Frequent cause of upper GI bleeding
Esophagitis
Inflammation of Esophagus
- Reflux of acid from stomach into lower stomach
- GERD = Gastroesophageal Reflux Disease
Dyspepsia
Difficulty Digesting Food
Gastroenteritis
Stomach and Small Intestinal inflammation; Stomach flu
Hematemisis
Vomiting of blood from the stomach
Achalasia
Failure of food to pass from esophagus into stomach
Hyperbilirubinemia
Jaundice; Elevated levels of bilirubin in blood
Icterus - Yellowing of the whites of eyes
Hepatopathy
Liver disease
Hepatomegaly
Enlarged Liver
Cirrhosis
Chronic liver disease; Fibrosis of Liver
Cholelithiasis
Stones in the gallbladder
Choledocholithiasis
Stones in common bile duct
Cholangitis
Inflammation of bile ducts
Cholecystitis
Inflammation of gallbladder wall
Small Bowel Obstruction (SBO)
Mechanical bowel blockage
- usually requires surgical intervention
ileus
Lack of normal peristalsis
Enteritis
Inflammation of the small bowel
Colitis
Inflammation of the colon
Inflammatory Bowel Disease
Serious condition
- Ulcerative colitis; Crohn’s Disease
Irritable Bowel Disease
Self limited condition
- Campy abdominal pain; Diarrhea and Consitpation
Diverticulitis
Inflammation of diverticula of colon
- Causes left lower abdominal pain
Dysentery
Serious form of infectious diarrhea
- Bloody diarrhea; High fever with abdominal pain
- Salmonella or Shigella
Volvulus
Instestinal blockage from twisting of bowel loop
Intussusception
Instestinal blockage from telescoping
Ascites
Fluid accumulation inside abdominal cavity
Polyposis
Multiple Polyps in wall of colon
Hematochezia
Bright red bleeding from the rectum
Melana
Maroon or dark red blood in stool
Steatorrhea
Fat in stool
Paracentesis
Removal of fluid from abdominal cavity
Cholecystectomy
Removal of gallbladder
Gastrectomy
Removal of stomach
Anastomosis
Surgical reconnection of two parts of bowel parts
Cathartic
Laxative
Antispasmodic
Controls intestinal spasm
Antacid
Neutralizes excessive acid in stomach
Antidiarrheal
Controls loose stools
Antiemetic
Treats nausea