1. Warm Up 12 5/5 Happy Cinco de Mayo! Bronchi Bronchioles Nose mouth
Larynx
Pharynx
Trachea
Lung
Alveoli
Diaphragm

2. THE DIGESTIVE SYSTEM
Breaks down food and passes nutrients into your body

3. Mechanical- physical breakdown of food
Chemical- involves enzymes

4. I. The Mouth 1. Teeth- crush food Saliva moistens food
2. Amylase breaks down starches & release sugar
3. Lysozyme digests cell walls of bacteria

8. II. Esophagus Food tube to stomach
4. Epiglottis covers trachea to prevent choking
5. Bolus chewed up food
6. Peristalsis – muscular contractions push food down
7. Cardiac sphincter – closes esophagus- prevents back flow

9. III. Stomach Large muscular sac
Continues mechanical digestion (contractions churn & mix food)
8. Mucus lubricates and protects wall
9. Hydrochloric acid- stomach acid
10. Pepsin (enzyme)- digest protein
Food becomes 11. chyme- mixture of food and liquid

12. IV. Small Intestine 12. Chemical digestion and absorption of food
13. Pancreas produces enzymes that break down food, hormones to regulate sugar levels, & chemicals to neutralize stomach acids
14. Liver- produces bile
15. Bile- like detergent to dissolve fat
16. Gallbladder- stores bile

13. 20 ft
17. Villi- fingerlike projections absorb nutrients

14. V. Large Intestine (5 ft) 18. Removes water from undigested material
19. Concentrated waste remains through the rectum and eliminated out 20. anus

15. What is the difference between bolus and chyme?

16. Put the following in order:
Stomach, esophagus, mouth, large intestine, rectum, anus, small intestine

17. Bring a plastic bag tomorrow for our lab.