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Food enters the mouth, where the work of the digestive system begins.Chewing, which takes place in the mouth, seems simple enough - teeth tear and crush the moistened food to a fine paste until it is ready to be swallowed. Teeth are anchored in the bones of the jaw by a network of blood vessels and nerves that enter through the roots of the teeth.The surfaces of the teeth, which are much tougher than ordinary bone, are protected by a coating of mineralized enamel. After the bolus is swallowed, it passes through the esophagus, or food tube, into the stomach.
The pancreas provides additional enzymes to help digest all sorts of food.
The liver also processes the digested food from your blood before it gets sent to various places in your body to be used.
Activities Take a ten question quiz about this page.
The digestive system uses mechanical and chemical activities to break food down into absorbable substances during its journey through the digestive system.
Known as the peristalsis, these contractions, which occur throughout the alimentary canal, squeeze the food through the 25 centimeters of the esophagus.
Food from the esophagus empties into a large muscular sac called the stomach.
Note the route of non-fat nutrients from the small intestine to their release as nutrients to the body.
The processes of digestion include six activities: ingestion, propulsion, mechanical or physical digestion, chemical digestion, absorption, and defecation.
We call this "going down the wrong pipe" and it can make us choke. Food hangs out in the stomach for around four hours.
This flap is called the epiglottis and, fortunately for us, it works automatically. While the food sits there, more enzymes go to work on it, breaking down things like proteins that our bodies can use.