digestive system Flashcards
what’s the job of the digestive system
prepares food to be assimilated by the body and absorb nutrients and water
mechanical digestion
movement
ex. teeth
chemical digestion
substance
ex. saliva
mouth
alimentary tract
mechanical: teeth
chemical: saliva
food+saliva: bolus
pharynx (throat)
alimentary tract
shared with the respiratory system
epiglottis (sphincter) at the end of the pharynx
esophagus
alimentary tract
connects the pharynx with the stomach
performs peristaltic movements to the bolus
liver
accessory organ
forms the bile substance/ emulsifier that breaks down fats
stomach
alimentary tract
transforms bolus to chyme when mixed with gastric acids
gallbladder
accessory organ
stores bile
pancreas
accessory organ creates pancreatic juice that contains sodium bicarbonate to neutralize the reaction
small intestine
alimentary tract
1. duodenum
2. jejunum
3. ilem
absorbs nutrients
chyme changes into chyle
large intestine
alimentary tract
water absorption
produce methane gas
chyle changes into feces
