Digestive System (27 feet of gastrointestinal fun) Parts and Functions

Parts of Digestive (GI) Tract Mouth – breaks food into smaller pieces, mixes with slippery saliva Pharynx – (throat) moves food from mouth Esophagus – Squeezes food down to the stomach by using peristalsis –(muscle contractions to move food)

Parts of Digestive (GI) Tract Stomach – squeezes the food, acid and enzymes break down food into soupy mixture called chyme Small Intestine – absorbs nutrients through villi (finger-like projections) Large Intestine – water is absorbed from undigested food

Parts of Digestive (GI) Tract G. Rectum – stores waste H. Anus – eliminates waste

More Parts… Salivary Glands – amalyse breaks down carbohydrates Liver – makes bile to breaks down fat, stores nutrients, breaks down toxins Gall Bladder – stores bile from liver Pancreas – makes neutralizing liquid and insulin

Ms. Spera’s Top Five Things That Break It Down. 5. Saliva (amylase) – breaks down carbohydrates 4. Pepsin – breaks down proteins 3. Insulin – breaks down sugar 2. Bile – breaks down fats 1. Will it be YOU?!?!?!?! --------------------------------------------------

Muscles/ Enzymes Used and Function Mechanical and/or Chemical What is being digested?   Part Function Muscles/ Enzymes Used and Function Mechanical and/or Chemical Sesame- Seed bun Mouth Chewing Starts break down food Amylase: breaks down carbs Both Esophagus Pushes food Sphincter: prevents food from leaving Peristalsis: muscular contractions Epiglottis: flap of tissue covers trachea Mechanical Beef patties Cheese Stomach (3-6 hours) Mixes food HCl breaks down food Acid: mixes with food to make chyme Pepsin: breaks down proteins Special Sauce Lettuce Pickles Onions Fat Small Intestine (3-5 hours) *pancreas *liver *Gall bladder Absorbs of nutrients and puts into blood stream Villi: network of blood vessels Bile: breaks down fat Insulin: breaks down sugar  Mechanical ** Accessory organs are Chemical  Water Large Intestine (18-24 hours) Absorbs leftover water in undigested food