digestion 1 Flashcards
(53 cards)
eructation bonus question
belch
Gastrointestinal Tract
mouth
pharynx
esophagus
stomach
small intestine
large intestine: appendix, colon, rectum
anus
Accessory Organs
teeth
tongue
salivary glands
liver
gallbladder
pancreas
_______taking in food and liquids through mouth
ingestion -
_________production and release of water, acid, buffers and enzymes into the lumen of the GI tract
secretion -
________- alternating contraction and relaxation of smooth muscle (segmentation contractions) in wall of GI tract mixes the food with the juices and moves it along
mixing and propulsion
_______process of breaking down food into molecules small enough to be taken into cells of the body
digestion -
_______mechanically breaking down large pieces of food into smaller pieces with greater surfaces area so that enzymes can work more efficiently
mechanical digestion -
_________digestive enzymes hydrolyse large polymers such as starch into glucose and triglycerides into fatty acids and glycerol
chemical digestion -
________the passage of small molecules through the plasma membranes of epithelial cells lining the stomach and intestines to the blood and lymph
absorption -
______ elimination of feces from the GI tract
defecation -
_____include indigestible substances, lots of bacteria, epithelial cells sloughed off the lining of the GI tract and digested material that was not absorbed
feces
_____lines the digestive organs
epithelium -
mouth, esophagus and anal canal possess _________
non-keratinized, stratified squamous
________beneath the epithelial lining
lamina propria - areolar connective tissue layer
_________which produce the folds of the mucous membrane to increase the surface area
muscularis mucosa - smooth muscle fibers
muscularis mucosa - smooth muscle fibers which produce the folds of the mucous membrane to increase the surface area
these folds include _____ of intestine and_____ of stomach
villi, rugae
______- areolar CT which binds the mucosa to the muscularis, highly vascularized
Submucosa
_______ in the mouth, pharynx and upper esophagus used to produce voluntary swallowing, this is gradually replaced by smooth muscle in lower esophagus and throughout rest of digestive tract
Muscularis - skeletal muscle
______- outermost layer which is a serous membrane composed of epithelium and CT
Serosa
_______ covers organs in the abdominal cavity
visceral peritoneum
_____ lines the abdominal cavity
parietal peritoneum
accumulation of fluid during infection (such as with peritonitis) is called ______
ascites
organs that lie in the posterior body wall and covered by parietal peritoneum on their anterior surface only are referred to as ______ i.e. kidneys, adrenal glands, pancreas, ascending and descending colon
retroperitoneal