The digestive system breaks down food into simpler molecules.

Tongue- push food around and down Mouth Teeth- break down food Tongue- push food around and down Saliva- moistens food, contains amylase (enzyme that breaks down starches into sugars) mouth

Peristalsis- contractions that move food to stomach Esophagus Peristalsis- contractions that move food to stomach Cardiac Sphincter- prevents contents from flowing back esophagus

Pepsin- enzyme that breaks down proteins Mucus protects wall Stomach Large muscular sac Very acidic Pepsin- enzyme that breaks down proteins Mucus protects wall Stomach

Pancreas- helps digest fat and protein bile from the liver/gallbladder helps digest fats liver bile Pancreas stomach bile chyme bile gallbladder pancreas enzymes duodenum

Lined with villi / microvilli - finger like projections Small Intestine Lined with villi / microvilli - finger like projections Nutrients are absorbed through wall into blood stream small intestine

Large Intestine (Colon) Removes water Bacteria help absorb vitamin K large intestine

Rectum/Anus Eliminates waste rectum/anus