2. A. Digestion  Process of breaking down food into smaller parts B. Mechanical/Physical Digestion  Examples: Chewing/Crushing/Tearing food C. Chemical Digestion  Use of enzymes to break down food D. Absorption  Take in nutrients/molecules in the body

4. 1. 32 Teeth Total 2. Incisors  Front  Rip/Tear Food 3. Canines  “Fangs”  Hold Food 4. Molars  Back  Grind Food 5. Wisdom Teeth  Develop in later years  Used to replace lost teeth

5. 1. Helps move food  Muscle 2. Taste  Tastebuds on surface

6. 1. Produces Saliva 2. Moistens/ softens food 3. Lubricates Mouth 4. Amylase  Enzyme that breaks down starches & carbs

7. 1. Flap that covers the trachea when you swallow  Prevents food from going down your windpipe

8. 1. Receives the food from your mouth 2. Swallowing takes place here 3. Located in the back

9. A. Tube to Stomach B. Peristalsis 1. Wave-like muscle contractions that move food

11. 1. Pepsin & Hydrochloric Acid  Break down proteins during digestion 2. Mucus  Lining of stomach  Necessary in order for stomach to not “eat itself”

12. 1. End product of stomach digestion 2. Takes stomach about 40 minutes to get to this point 3. Greenish in color

13.  Where most chemical digestion takes place

14. 1. First 25 cm of small intestine 2. Horseshoe shape

15. 1. Produce substances to neutralize acids from food in stomach

16. 1. Pancreas  Digests: Carbs, Proteins, & Fats 2. Liver  Gall Bladder ▪ Stores bile  Bile ▪ Digests fat ▪ Greenish in color

17. 1. Villi  Tiny fingerlike projections in stomach  Food absorbed here  Increases surface area  Microvilli (even smaller) 2. Fats enter bloodstream 3. Diffusion – allows nutrients from food to enter blood

18. 1. Current function is unclear 2. One theory is that it used to store good bacteria for the body

19. 1. Involved with waste products 2. Absorb water 3. Large amount of bacteria found in these locations

20. 1. Opening at the opposite end of the digestive tract from the mouth 2. Control expulsion of unwanted semi- solid matter