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

2. 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)

3. 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

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

5. 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

6. 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?!?!?!?!

7. 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