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Published byLee Owen Modified over 9 years ago
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The Human Digestive System
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Incisors: Soft palate: Tongue: Uvula:
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Incisor: Canine: Premolar: Molar:
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Salivary glands produce saliva, a mix of: -
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Enamel: Dentin: Pulp: Cement: Nerve Blood vessel Crown Root
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Different skulls Tiger Carnivore Raccoon Omnivore
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Different skulls Horse Herbivore Omnivore
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Different skulls Sheep Herbivore Bear Carnivore
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Experiment on digestion Use saliva to break down (boiled) starch The substance that digests is called: an enzyme Test the best temperature for the enzyme to work in
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Starch test Starch + Iodine solution > blue-black Starch + Iodine + saliva > Shake holding the test tube in your hand > Record the time > > solution turns colourless (starch has been digested)
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Test tube (1) boiled starch + Iodine + saliva at body temperature Test tube (2) boiled starch + Iodine, kept at 60 degrees C for 10 minutes + saliva Test tube (3) boiled starch + Iodine, kept at 4 degrees C for ten minutes + saliva
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Tooth decay
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Formation of plaque Acid attacks on enamel Enamel dissolves Small cavity in the enamel Crack in enamel exposes pulp Pulp gets infected (pain!) Pulp tissue dies, tooth is lost
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Tooth decay Apply tooth paste Brush (circular movements0 Floss Brush Rinse Brush Rinse
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