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DIGESTIVE SYSTEM. FUNCTIONS. THERE ARE THREE FUNCTIONS OF THE DIGESTIVE SYSTEM: BREAKS DOWN FOOD INTO MOLECULES THE BODY CAN USE THE MOLECULES ARE ABSORBED INTO THE BLOOD AND CARRIED THROUGHOUT THE BODY. WASTES ARE ELIMINATED FROM THE BODY. MOUTH.
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FUNCTIONS • THERE ARE THREE FUNCTIONS OF THE DIGESTIVE SYSTEM: • BREAKS DOWN FOOD INTO MOLECULES THE BODY CAN USE • THE MOLECULES ARE ABSORBED INTO THE BLOOD AND CARRIED THROUGHOUT THE BODY. • WASTES ARE ELIMINATED FROM THE BODY
MOUTH THE MOUTH IS RESPONSIBLE FOR MECHANICAL AND CHEMICAL DIGESTION. MECHANICAL – TEETH BREAK DOWN AND GRIND THE FOOD CHEMICAL – Salivary Amylase (enzyme that breaks down carbs.)
Mouth • Teeth • Incisors • Canines • Molars • Does Food Pass Through Here? • Yes
Salivary Glands • Has Enzymes that break down carbohydrates in food (Amylase) • Produces saliva to begin chemical digestion and to make it easier to swallow • Food does not pass through here.
Epiglottis • Flap that covers your windpipe • Nothing is broken down here • Food does NOT pass through here
Esophagus • A muscular tube that connects mouth to stomach • Peristalsis: Contractions to push food downward • Mucus thick slippery substance • Nothing is broken down here. • Food does pass through here.
STOMACH • Holds 2 liters of food • J shaped muscular pouch • Mechanical and Chemical Digestion
Stomach • Mechanical and Chemical • HCL Acid and enzymes break down protein and carbs.
SMALL INTESTINE 6 meters long MOST chemical digestion MOST absorption takes place here
Small Intestine • Protein, Carbohydrates, and Fats are digested here • Food DOES pass through here.
Gall Bladder • Stores Bile (substance that breaks up fat) • Connected to the small intestine • Food does NOT pass through here • Nothing is broken down here but the bile breaks down fat in the S.I.
Liver • Makes Bile • Largest and Heaviest organ inside body • Nothing passes through the Liver • The liver breaks down nothing
Pancreas • Makes enzymes needed to digest proteins, fats, and carbohydrates • Connected to the S.I. • Food does not pass through • Nothing is broken down HERE
LARGE INTESTINE 1 ½ meters long Absorbes water and readies waste for exit.
Rectum • Waste material is compressed into a solid form. • Anus is a muscular opening
THE DIGESTIVE SYSTEM http://kidshealth.org/misc_pages/bodyworks/digest.html http://kidshealth.org/kid/body/digest_noSW_p7.html