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Digestive System6th Grade Science
Digestive system
I. FunctionA. Breaks down food1. Mechanical  Physical2. Chemical - EnzymesB. Absorb nutrients into bodyC. Eliminate waste60
II. PartsA. Length	9 meters long*Why so long?*B. Alimentary Canal TubeMouthEsophagusStomachSmall IntestineLarge Intestine
C. Accessory OrgansTeethTongueSalivary GlandsPancreasLiverGallbladder
III. PathwayMouth1. Mechanicali. Teeth			a. Regions				1. Crown				2. Neck				3. Root			b. Parts				1. Enamel				2. Dentin				3. Pulp62
i. Teethc. Types	1. Incisors Cut	2. Canine Tear	3. Molar Grind*What can we learn about teeth types?*62
ii. TongueThick muscleTaste budsSourBitterSweetSaltUmami62
2. Chemicali. Salivary Glands	a. Enzyme Amylase			1. Carbohydrates*Why sugars?*63
B. Throat1. Trachea for air to lungs2. Esophagus for food to stomachi. Pushed down by muscle contractions			(Peristalsis)3. Separated by epiglottis*What problems does this create?*63
C. Stomach1. Mechanicali. Three layers of muscle2. Chemicali. Enzyme Pepsin		a. Protein	ii. High Acid		a. Unfold protein		b. Kill germs		c. Covered in mucus*Antacids?*64
D. Pancreas1. Produces enzymes	a. Protein, Fat, Carbs2. Produces Hormones	a. Insulin  Controls blood sugar levels70
E. Liver/Gallbladder1.Largest internal organ2. Maintain blood3. Produces bilei. Store in gall bladder	ii. Aid in fat digestion4. Removes poisons from food/drink?*Alcohol destroys liver, Why?*69
F. Small Intestine	1. Mechanical 	2. Chemical		- Many enzymes	*3. Absorption*		- Tiny Villi	4. Sizei. Length 5 meters		ii. Width 3-4 cm70
G. Large IntestineMechanicalChemicali. Lots of bacteria	ii. Produce key vitamins3. Absorption of water4. Removal of waste5. Sizei. Length 1.5 meters	ii. Width 4 - 6 cmAPPENDIX?71
H. Anus
IV. DiseasesHeart BurnB. UlcersC. DiabetesD. GallstonesE. AppendicitisF. CancerG. Irritable bowel syndrome1. Crohns disease2. Ulcerative colitis

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