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The Digestive System

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What are the three functions of the digestive system 1. Breaks down food into molecules the body can use. 2. The molecules are absorbed into the blood as nutrients and carried throughout the body. 3. Waste are eliminated from the body
digestion The process by which body breaks down food into small nutrient molecules
What are two types of digestion Mechanical and chemical
Mechanical digestion Chewing food using your teeth, saliva softens the food to make it easier to chew and swallow
Chemical digestion Saliva breaks down starch into sugars
Saliva An enzyme called amylase
Esophagus Muscular tube that connects mouth to stomach
How long does it take food to travel to the stomach after you swallow? 10 seconds
Small intestine The part of the digestive system in which most chemical digestion takes place
Liver The largest and heaviest organ inside the body. It produces bile
Bile A substance produced by the liver that breaks up fat particles.
Gallbladder The organ that stores bile after it is produced by the liver
Pancreas A triangular Oregon that produces enzymes that flow into the small intestine
Villi Tiny finger shaped structures that cover the inner surface of the small intestine and provide a large surface area through which digested food is absorbed.
Large intestine The last section of the digestive system where water is absorbed from food and they remaining material is eliminated from the body
Rectum A short tube at the end of the large intestine where waste material is compressed into a solid form before being eliminated
Anus The opening at the end of an organism's digestive system through which waste exits
Created by: sbe229



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