Digestive system
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Digestive system

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Digestive system Presentation Transcript

  • 1. Digestive System
    6th Grade Science
  • 2.
  • 3. I. Function
    A. Breaks down food
    1. Mechanical – Physical
    2. Chemical - Enzymes
    B. Absorb nutrients into body
    C. Eliminate waste
    60
  • 4. II. Parts
    A. Length
    9 meters long
    *Why so long?*
    B. Alimentary Canal “Tube”
    Mouth
    Esophagus
    Stomach
    Small Intestine
    Large Intestine
  • 5. C. Accessory Organs
    Teeth
    Tongue
    Salivary Glands
    Pancreas
    Liver
    Gallbladder
  • 6. III. Pathway
    Mouth
    1. Mechanical
    i. Teeth
    a. Regions
    1. Crown
    2. Neck
    3. Root
    b. Parts
    1. Enamel
    2. Dentin
    3. Pulp
    62
  • 7. i. Teeth
    c. Types
    1. Incisors “Cut”
    2. Canine “Tear”
    3. Molar “Grind”
    *What can we learn about teeth types?*
    62
  • 8. ii. Tongue
    Thick muscle
    Taste buds
    Sour
    Bitter
    Sweet
    Salt
    Umami
    62
  • 9. 2. Chemical
    i. Salivary Glands
    a. Enzyme Amylase
    1. Carbohydrates
    *Why sugars?*
    63
  • 10. B. Throat
    1. Trachea for air to lungs
    2. Esophagus for food to stomach
    i. Pushed down by muscle contractions
    (Peristalsis)
    3. Separated by epiglottis
    *What problems does this create?*
    63
  • 11. C. Stomach
    1. Mechanical
    i. Three layers of muscle
    2. Chemical
    i. Enzyme Pepsin
    a. Protein
    ii. High Acid
    a. Unfold protein
    b. Kill germs
    c. Covered in mucus
    *Antacids?*
    64
  • 12. D. Pancreas
    1. Produces enzymes
    a. Protein, Fat, Carbs
    2. Produces Hormones
    a. Insulin – Controls blood sugar levels
    70
  • 13. E. Liver/Gallbladder
    1.Largest internal organ
    2. Maintain blood
    3. Produces bile
    i. Store in gall bladder
    ii. Aid in fat digestion
    4. Removes poisons from food/drink?
    *Alcohol destroys liver, Why?*
    69
  • 14. F. Small Intestine
    1. Mechanical
    2. Chemical
    - Many enzymes
    *3. Absorption*
    - Tiny Villi
    4. Size
    i. Length 5 meters
    ii. Width 3-4 cm
    70
  • 15. G. Large Intestine
    Mechanical
    Chemical
    i. Lots of bacteria
    ii. Produce key vitamins
    3. Absorption of water
    4. Removal of waste
    5. Size
    i. Length 1.5 meters
    ii. Width 4 - 6 cm
    APPENDIX?
    71
  • 16. H. Anus
  • 17. IV. Diseases
    Heart Burn
    B. Ulcers
    C. Diabetes
    D. Gallstones
    E. Appendicitis
    F. Cancer
    G. Irritable bowel syndrome
    1. Crohn’s disease
    2. Ulcerative colitis