rad tech 12 Flashcards
alimentary canal
musculomembranous tub, about 30 ft long, extending from the mouth of the anus and lines with mucous membrane aka digestive track
amylase
enzyme that breaks down starch into smaller carbohydrate molecules
bile
a bitter, yellow green secretion of the liver
cardiac sphincter
muscular ring in the stomach that controls the passage of food form the esophagus into the stomach (lower)
cecum
a cul de sac containing the first part of the large intestine. joins with the ileum
cholelithiasis
abnormal presence of gallstones in the gallbladder
chyme
the liquidlike material of partially digested food and digestive secretion found in the stomach just before it is released into the duodenum
colon
the portion of the large intestine extending from the cecum to the rectum
defecation
the act of expelling feces
deglutition
swallowing
duodenum
first portion of the small intestine; shortest and widest
esophagus
muscular canal., about 9.4 inches long that extends from the pharynx to the stomach
gallbladder
pear shaped excretory sac lodged in a fossa on the visceral surface of the right lobe of the liver
gastroenterologist
a medical doctor who specializes in the study of the diseases and disorders affecting the GI tract
glucagon
a hormone produced by the alpha cells of the pancreas that stimulates the liver to convert glycogen into glucose when blood sugar is low
hematemesis
vomiting of blood
ileum
distal portion of the small intestine extending form the jejunum to the cecum
jejunum
intermediate or middle of the three portions of the small intestine, connecting proximally with the duodenum
laparoscope
thin walled, flexible tube with a telescope lens and light that is inserted through the incision in the abdominal wall to examine or perform minor surgery with the abdominal cavity
lavage
process of irrigating an organ, usually the bladder or bowel
liver
the largest gland of the body and one of the most complex organs
lower GI tract
lower portion of the gastrointestinal tract consisting of the small and large intestines
mastication
chewing, tearing or grinding food with the teeth while it becomes mixed with saliva
oropharynx
the section of the pharynx leading away from the oral cavity
pancreas
an elongated organ approximately 6-9 inches long, located in the upper left quadrant of the abdomen that secretes various substances
peristalsis
the coordinated rhythmic serial contraction of smooth muscle that forces food through the digestive tract, etc
pyloric sphincter
a thickened muscular ring in the stomach that regulates the passage of food from the pylorus of the stomach into the duodenum
rectum
portion of the large intestine about 4.7 inches long, continuous with the descending sigmoid colon
rugae
a ridge or fold that presents large folds in the mucous membrane of that organ
sigmoid colon
the portion of the colon that extends from the end of the descending colon in the pelvis to the juncture if the rectum
sphincter
circular band of muscle fibers that constricts a passage or closes a natural opening in the body, such as the hepatic sphincter into the muscular coat of the hepatic veins near their union with the superior vena cava