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The digestive System Facts about the digestive system How much saliva does the human mouth produce everyday? 1.7 liters How many different species of bacteria are present in the digestive tract? Around 400 How much hydrochloric acid does the human stomach produce everyday? 2 liters Every day people eat food. Some of the waste in the body. food becomes ________ Before getting rid of the wastes, the body _______________ out the useful nutrients. separates breaking Digestion is the process of ______________ down food into simple substances your body can use. The starting point of the digestive system is the mouth ____________. As you grind up the food with salivary ________ glands your teeth, ________ produce saliva, which break down the chemicals in the food a bit. This allows the food to become swallow tongue mushy and easy to __________. Your __________ pushes the tiny bits of food toward the back of your throat. The second part of the digestive tract is the ______________. It is like esophagus a stretchy pipe (about 10 inches long) that moves food from the back of the throat to the ____________. stomach The muscles of the esophagus slowly squeeze the food into the stomach, which takes about 2-3 seconds. mixer The stomach is like a ________, churning and mashing together all the small bits of food into smaller and smaller pieces. It does this with help from the strong muscles in the walls of gastric the stomach and _________ juices. These juices also help kill bacteria that may have been in the eaten food. The stomach has three important jobs: store *To _______ the food you’ve eaten *Tobreak _______down ________ the food into a liquidy mixture *To empty to mixture into the _______ small ___________ intestine The small intestine is a long tube 22 feet long packed about _____ beneath the stomach. It breaks down the food mixture even more so your body can absorb all the vitamins, minerals, proteins, carbohydrates, and fats. Food can stay in the small intestine for 4 to 5 hours while it digests. This is possible with help from the pancreas _______, liver and ______ gall __________, bladder which all _____________, send digestive juices to different parts of the small intestines. The pancreas makes most of the juices that help the body digest _______ fats and _____________. proteins Gastric juices from the liver are bile which helps to called _______, absorb fats into the bloodstream. The liver also filters out harmful wastes turning them into more bile. It also helps figure out how many nutrients will go to the rest of the body, and how many will stay behind in storage. The gallbladder serves as a warehouse for bile, storing it ______________ until the body needs it. Once food leaves the small intestine, it enters the large ___________. intestine It is a tube about 5 feet long. It has a _______ larger diameter than the small intestine. Remaining water and nutrients are removed, and the left over waste- parts of the food that your body can’t use- are moved to the rectum which is the last part of the digestive tract. The __________, anus solid waste stays here until it is pushed through the _________.