1. PP
DIGESTIVE SYSTEM

2. FUNCTION
Breakdown of food into simpler molecules that can be absorbed by the body in one long tube from mouth to anus

3. NUTRIENTS
6 classes of nutrients:
carbohydrates
fats
proteins

4. NUTRIENTS 6 classes of nutrients: carbohydrates fats proteins
minerals: help balance osmosis and the function of certain cells (i.e muscle and nerve cell)
vitamins: aid enzyme activity
water: most chemical reactions can only occur in water (accounts for half of your body weight)

6. Mechanical vs. Chemical Digestion
Mechanical: physical breakdown of food
Chewing, peristalsis (moving bolus down the esophagus), and stomach churning

7. Mechanical vs. Chemical Digestion
Chemical Digestion: Enzymes breaking down food into simpler forms (monomers)

8. DIGESTIVE TRACT MOUTH AND ESOPHAGUS
Amylase (enzyme) is released from glands into saliva
Breaks down carbs to monosaccharides

9. DIGESTIVE TRACT MOUTH AND ESOPHAGUS
Amylase (enzyme) is released from glands into saliva
Breaks down carbs to monosaccharides
Bolus (food ball) travels down esophagus to stomach

10. STOMACH Muscle contractions break bolus apart (mechanical digestion)
Pepsin (enzyme) breaks down proteins into amino acids
Released by gastric glands
HCl keeps stomach acidic so the pepsin can work

11. PANCREAS
Secretes sodium bicarbonate (base) into small intestine to neutralize acid.

12. LIVER
Produces bile and stores it in the gall bladder

13. GALL BLADDER Stores bile and secretes it into the small intestine
Breaks down fats into fatty acids

14. SMALL INTESTINE
Chemical digestion and nutrient absorption

15. SMALL INTESTINE Chemical digestion and nutrient absorption
Villi: Folds in lining of small intestines
Increases surface area for maximum absorption.

16. LARGE INTESTINE/COLON
Absorption of water, minerals, and vitamins

17. Salivary glands
Esophagus
Liver
Stomach
Pancreas
Gall bladder
Large intestine/colon
Small intestine