The Journey of the Digestive System * Digestion startsin the mouth. Teeth grind the food, then, the salivary glandsrelease saliva to help break down and lubricate the food. Thisassists the food in making it’s twelve hour and thirteen-footjourney through the gut. The food passes from the stomach and intothe coils of the small intestine before finally passing into thelarge intestine. Waves of contracting muscle keep the food movingvia a process called: peristalsis. These digestive contractions areso powerful that we can even eat our food while laying down orbeing upside-down. Food enters the stomach through a hole at thetop. The stomach is a bag of muscle that churns, squashes andsqueezes food into liquid. At the same time, acids break the fooddown, and the stomach walls protect themselves with a lining ofmucous. Without the protective mucous lining, the acids could startto digest parts of the stomach itself, and cause stomach ulcers.Eventually, the stomach squeezes the broken-down food out through atiny hole called the pyloric sphincter. The food enters the smallintestine this is an eleven-foot coil of tube where most of thenutrients are absorbed. The interior wall of the small intestine islined with billions of microscopic projections called villi. Theseincrease the surface area of the gut by making it easier toabsorb nutrients. First the pane releases an important chemicalthat neutralizes stomach acid: bicarbonate ions.
Instructions: The paragraph above contains 10 errorsof various types: verb form and tense, and use of the comma, colon,and semi-colon. Please note that the paragraph may also containsome errors based on earlier material we have reviewed. On thechart below, identify the line in which the error is located, typethe existing error, and then type the correction.
