Digestion system Digestion system By By Claire Simpson & Abbie Maclean By By Claire Simpson & Abbie Maclean.

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Presentation transcript:

Digestion system Digestion system By By Claire Simpson & Abbie Maclean By By Claire Simpson & Abbie Maclean

The mouth starts everything moving. Even before you eat, when you smell a tasty food, see it, or think about it, digestion begins, saliva starts to form in your mouth. When you do eat, the saliva brakes down the chemicals in the food a bit, which helps to make the food mushy and easy to swallow. Your tongue helps out, pushing the food around whilst you chew with your teeth. When you are ready to swallow, the tongue pushes a tiny bit of mushed up food called a bolus towards the back of your throat and into the opening of your Esophagus, the second part of the digestive track.

On the way down The Esophagus is like a stretchy pipe thats about 10inches (25cm long.) Its moves food from the back of your throat to your stomach, also at the back of your throat is your wind pipe, which allows air to come in and out of your body.When you swallow a small ball of mushed up food or liquids, a special flap called the Epiglottis flops down over the opening of your windpipe to make sure the food enters the Esophagus and not the windpipe. If you ever have drunk something to fast, starting coughing, and heard someone say your drink “went down the wrong way,” the person meant that it went down your windpipe by mistake. this happens when the Epiglottis doesn't have enough time to flop down, and you cough without thinking about it to clear your wind pipe. Once the food has entered the Esophagus, it doesn't just drop right into your stomach, instead, muscles in the walls of the Esophagus move in a wavy way to slowly squeeze the food through, this takes about two or three seconds.

See you in the stomach See you in the stomach Your stomach which is at the end of the Esophagus is a stretchy sack shaped in the letter “J.” It has 3 important jobs: 1: to store the food you have eaten 2:to break down the food into a liquid mixture. 3: to empty slowly that liquid mixture into the small intestine. The stomach is like a mixer, churning and mashing together all the small balls of food that came down the Esophagus into smaller and smaller pieces. It does this with help from the strong muscles in the walls of the stomach and gastric juices that also come from the stomach’s walls. In addition breaking down food, gastric juices also help kill bacteria that might be eaten food.

22 feet isn't small at all The small intestine is a long tube thats about 1.5 inches to 2 inches (about 3.5 to 5 cm)around, and its packed inside you beneath your stomach. If you stretched out an adults small intestine, it would be about 22 feet long (6.7meters)-thats like 22 notebooks lined up end to end in a row! The small intestine breaks down the food mixture so your body can absorb all the vitamins, minerals, proteins, carbohydrates and fats. with a help from pancreas, liver and gallbladder. The pancreas makes juices that help the body digest fats and protein. the liver produces bile which helps absorb fat into the bloodstream, it also filters out harmful substances or wastes, turning some of the waste into more bile. your food can spend up to 4 hours in the small intestine and it will become a very thin, watery mixture.

Thats one large Intestine. At 3 or 4 inches around (about 7 to 10 centimeters), the large intestine is fatter than the small intestine and its almost the last stop on the digestive tract. It is packed into the body, and would measure 5 feet ( about 1.5 meters) long if you spread it out. It has a tiny tube with a closed end coming off it called the appendix it doesn't seem to do anything. Waste left over passes through the part of the large intestine called the colon which is where the body get its last chance to absorb the water and some minerals into the blood. As the water leaves the waste product, what's left gets harder & harder until it becomes solid, it’s poop (also called stool or bowel movement.) The large intestine pushes the poop into the rectum, the very last stop on the digestive tract. it stays here until you are ready to go to the bathroom.

Dig that digestive system. You can help your digestive system by drinking water and eating healthy diet. high-fibre foods, like fruits, vegetables, and whole grains, make it easier for poop to pass through your system. The digestive system is important part of your body. Without it, you couldn't get the nutritions you need to grow properly and stay healthy.

Question Time What is the first part of the digestive system? what shape is your stomach? Is the Esophagus a stretchy pipe? Does your tongue help?

Answers 1) the mouth starts everything moving 2) ‘J’ 3) True 4) yes your tongue helps out or true.

Thank you Thank you for watching and hope you learned lots about digestive system. Claire Simpson & Abbie MacLean