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The Digestive System :Ad-Lib Game: http://www.youtube.com/watch?v=Z7xKYNz9AS0 Functions Digest the food we eat Take the nutrients out of your food so your body can use it Chemical Digestion When chemicals in our body take large molecules & break them down into nutrients our body can send through our blood Saliva, stomach acid do this EWW!!! What is that?? http://www.youtube.com/watch?v =Uzl6M1YlU3w Chemical Digestion Demo… Put skittle in your mouth DO NOT CHEW OR MOVE WITH TONGUE *Remember what color you had After about 30 seconds take it out…this is chemical digestion. Your saliva has broken down the sugar molecules so that they can be absorbed into your blood Mechanical Digestion The physical breaking and crushing of food Teeth, tongue, movement of smooth muscle in peristalsis (squeezing of tubes to move/crush food) do this Mechanical/Physical Digestion Now Chew the skittle & move around with your tongue! This is physical or mechanical digestion! Breaking the food down into smaller pieces by ripping, crushing, and tearing it. Components Esophagus Stomach Small Intestine Large Intestine Gall bladder Liver Pancreas Esophagus the tube that connects your mouth and your stomach Stomach A stretchy bag that holds your food after you eat Helps to break food into smaller pieces so your body can use it for energy and nutrition Esophagus Stomach Small Intestine Tube that is 20 feet long. Where nutrients is absorbed into the blood. Food stays in your small intestine for 4 to 8 hours Small Intestine Large Intestine Tube that is 5 feet long Gets waste from small intestine Liquids are absorbed here Waste stays for 10 to 12 hours Large Intestine Gall Bladder Storage tank for bile (a greenishyellow liquid) that helps your body break down and use fats Located under your liver Shaped like a pear Gall Bladder Liver Factory for antibodies and bile Stores vitamins and sugars until your body needs them Liver Pancreas Helps you digest food by breaking down sugars Your homework… The Journal of a Hamburger Write the process of mechanical digestion as it goes through the mouth, esophagus, stomach, small intestine, large intestine, and rectum. Use information from the Magic School Bus to complete for tomorrow. (First column only!) The Magic School Bus! Complete the diagram as your watching! http://www.gamequarium.org/dir/Sq oolTube_Videos/Science/Human_Bod y/Digestive_System/magic_school_bu s_for_lunch_9673.html Healthy Habits Eat foods that are high in fiber like fruits and vegetables Drink plenty of water Chew your food completely before you swallow Avoid foods high in fat Interesting Facts Food is in your digestive system for about 24 hours Your stomach stretches when you eat like a balloon being filled with air You have a trap door called the epiglottis to cover your windpipe when you swallow. Your stomach mashes your food the way a baker kneads dough for bread.