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choledoch/o
common bile duct
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pharyng/o
pharynx; throat
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sialaden/o
salivary gland
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-lithiasis
condition of stones
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-prandial
pertaining to a meal
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-tripsy
surgical crushing
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alimentary canal
- 30 feet of muscular tubing in GI system
- AKA gut; gi tract
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6 organs of the GI system
- *oral cav *stomach
- *pharynx *small intestine
- *esophagus *colon
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4 accessory organs to the GI system
- *liver
- *pancreas
- *gallbladder
- *salivary glands
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Saliva contains:
- *lubricants
- *digestive enzymes
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incisors/cuspids/canines
front teeth that bite, tear, or cut
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bicuspids/premolars/molars
rear teeth that grind
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crown
part of tooth above gum line
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root
part of tooth below gum line
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Root anchors tooth to jaw with:
- *cementum
- *periodontal ligaments
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enamel
- *hardest material in body
- *covers crowns of teeth
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dentin
material under enamel that makes up bulk of tooth
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pulp cavity
hollow interior of crown
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root canal
hollow interior of the root
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pulp cavity/root canal contain tissue made of:
- *blood vessels
- *nerves
- *lymph vessels
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deciduous teeth
baby teeth (20)
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permanent teeth
32 teeth that begin replacing baby teeth around age 6-20
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portions of the pharynx that food enters first:
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epiglottis
cartilaginous flap that folds to cover larynx and trachea so food doesn't enter lungs
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esophagus
muscular tube below epiglottis (abt 10" in adults)
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peristalsis
muscular contractions of esophagus to move food
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3 parts of the stomach
- *fundus (upper region)
- *body (main portion)
- *antrum (lower region)
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rugae
folds in stomach lining that stretch when stomach is full
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Hydrochloric acid (HCl)
secreted by glands in mucous membrane lining of stomach
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chyme
liquid mixture of HCl, gastric juices and food (this is what the stomach breaks the food down to)
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sphincters
muscular valves that control entry into and exit from the stomach
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cardiac sphincter
- *AKA lower esophageal sphincter
- *keeps food from going backward into esophagus
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pyloric sphincter
- *valve at the end of the antrum
- *regulates passage into small intestine
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small intestine/small bowel
- *loc'd between pyloric sphincter and the colon
- *where most of digestion and absorption occurs
- *approx 20'
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duodenum
- *extends 10-12" from pyloric sphincter to jejunum
- *where chyme mixes with juices frm pancreas and gllblddr
- to complete digestion
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3 parts of small intestine:
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jejunum
- *middle part of sm. intestine/between duodenum and ileum
- *approx 8'
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ileum
- *final part of sm. intestine btwn jejunum and colon
- *approx 12'
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ileocecal valve
connects ileum to colon
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colon
- *AKA large intestine
- *where most water from the liquid that enters from the ileum after chyme has been proc'd
- *approx 5'
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part of GI tract that extends from ileocecal valve to the anus
colon/large intestine
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cecum
pouch loc'd in the first few inches of the colon
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veriform appendix
small, worm-shaped outgrowth at end of cecum
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4 parts of the colon
- *ascending colon
- *descending colon
- *transverse colon
- *sigmoid colon
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ascending colon
extends from cecum to lower border of liver
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transverse colon
2nd section of colon that extends from ascending colon across the abdomen horizontally, toward spleen
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descending colon
3rd portion of colon that extends from transverse colon down the left side of the body
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sigmoid colon
- *4th portion of colon that extends from descending colon to the rectum
- *S-shaped to bring the tract back to midline
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rectum
- *portion of GI tract that stores feces
- *leads to anus
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anus
*contains anal sphincter that consists of rings of vol and invol muscles that control evacuation
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bolus
- *formed by mixing of food and saliva during chewing
- *food ready to swallow
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amylase
- *digestive enzyme found in saliva
- *begins digestion of carbs
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3 pairs of salivary glands:
- *parotid glands (in front of ears)
- *submandibular glands (floor of mouth)
- *sublingual glands (floor of mouth)
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3 of the functions of the liver:
- *prod of bile
- *proc'ing of nutrients
- *detox
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bile
- *emulsifies large fat globules
- *produced by liver/stored in gallbladder
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emulsification
process by which large fat globs are broken down into smaller, more easily digested droplets by bile
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hepatic duct
downward duct that bile travels thru from liver to gallbladder
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cystic duct
upward duct that bile travels thru from liver to gallbladder
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common bile duct (CBD)
carried bile into duodenum where emulsification happens
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pancreas
- *connected to duodenum by pancreatic duct
- *produces/secretes buffers and pancreatic enzymes
- *an endocrine gland that produces insulin and glucagon
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buffers
pancreatic secretion that neutralizes the HCl in chyme as it leaves the stomach
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pancreatic enzymes digest:
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ascites
collection/accumulation of fluid in the peritoneal cavity
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cachexia
loss of weight and generalized wasting due to chronic disease
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dental caries
cavity/tooth decay
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hematochezia
bright red blood in stool
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jaundice
yellow cast to skin, mucous membranes and whites of eyes caused by deposit of bile pigment due to too much bilirubin in blood
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melena
- *dark, tarry stool
- *color caused by digestive enzymes working on blood in intestinal tract
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polyp
small tumor with pedicle or stem attachment usually found in nose or colon
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pyrosis
heartburn caused by stomach acid splashing up into esophagus
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aphthous ulcers
ulcers in the mouth of unk cause
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esophageal varices
enlarged varicose veins in the lower end of the esophagus, often related to liver disease
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hiatal hernia
protrusion of the stomach thru the diaphragm and extending into the thoracic cavity
GERD is a common sympton
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pepitc ulcer disease
ulcers in lower esophagus, stomach, and/or duodenum
abbrev PUD
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anal fistula
abnormal, tubelike passage from surface around the anal opening directly into the rectum
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Crohn's disease
form of chronic IBS affecting the ileum, and/or colon
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diverticulitis
iniflammation of diverticulum (outpouch off gut), esp in colon, often happens when food becomes trapped in the pouch
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diverticulosis
condition of having diverticulum
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ileus
severe abdominal pain, inability to pass stool, ab distension due to blockage
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inguenal hernia
protrusion of a loop of small intestine into the inguinal (groin) region thru a weak spot in the abs that develops into a hole
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intussusception
part of intestine slipping or telescoping into another section of intestine just below
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polyposis
- small tumors that contain a peticle (stem like attchmnt) in mucous membranes of colon
- *possibly pre-cancerous
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ulcerative colitis
chronic inflammatory cond that prods numerous ulcers to form on mucous membrane of colon
aka: IBD/irritable bowel disease
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volvulus
bowel twists upon itself causing an obstruciton
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cholelithiasis
presence of gallstones
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gavage
placing nasogastric tube to provide nourishement
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lavage
using a nasogastric tube to wash out the stomach
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total parenteral nutrition/TPN
100% nutrition provided thru feeding tube
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anastomosis
to surgically create a connection between 2 organs or vessels
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choledocholithotripsy
(koh-led-oh-koh-LITH-oh-trip-see)
crushing of gallstones in common bile duct
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'ac' as abbreviation
before meals
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'BE'
(abbrev)
barium enema
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'EGD'
(abbrev)
- esophagogastroduodenoscopy
- (visual exam of esophagus, stomach and beginning of duodenum)
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