Digestive System Flashcards
major organs of the digestive system
major: mouth, pharynx, esophagus, stomach, small and large intestine
functions of the digestive system
ingestion, mechanical digestion, chemical digestion, secretion, absorption, defaction
ingestion
food enters oral cavity
mechanical digestion
crushing food; propels food along the tract
chemical digestion
chemical breakdown of food into nutrients
secretion
release of waste
absorption
from the lumen of digestive tract into the body
defecation
elimination of waste (feces)
parts of the small intestine
duodenum, jejunum, illeum
metabolism
the process by which the body changes food and drink into energy
anabolism
synthesize essential compounds
catabolism
provide energy to cells
peristalsis
waves of muscular contractions that move a bolus along a GI tract; one direction
propulsion
moving bolus along digestive tract
mastication
chewing
