24.2 fn of the digestive system Flashcards
what are the 8 fn of the digestive system?
ingestion mastication chemical digestion propulsion mixing secretion digestion absorption elimination
during which fn of the digestive system is food mechanically broken down in the mouth?
mastication
why is food chewed?
to allow digestive enzymes to easily penetrate the food (solid food is difficult to digest)
what is deglutition
swallowing
how does the digestive system move food?
peristalsis
where does mixing occur?
in the tubing of the stomach
what are the fn of the secretions of the digestive system?
lubricate
liquify
digest
what is the fn of mucus secretion in the alimentary canal?
lubrication
what is the fn of water secreted in the alimentary tract?
liquifaction
what is the fn of bile in the digestive tract?
emulsifies fats (chops them up into smaller segments of lipids)
what is the fn of an enzyme in the alimentary canal?
chemical digestion
what occurs in the tubing of the stomach?
mixing
lubrication of the alimentary tract is from the
mucus secretion
what are responsible for chemical digestion?
enzymes
what is responsible for fat emulsification?
bile
