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Digestive System By: Tim Orozco & Jason Iemole Mouth The mouth is the source of sound and speech. It is a mechanical type of digestion. The mouth is a digestive secretion. It also helps digest food by breathing down the material. The function of the mouth is chewing and saliva. Salivary Gland The salivary gland is any of the three pairs of glands inside the mouth and digestive system that conceal the saliva for digestion. The function of the salivary gland is helping break down the food that you eat. Esophagus The esophagus is a mechanical type of digestion. There are no digestive secretion and/or enzyme in the esophagus. The function of the esophagus is moving the food slowly down to the stomach. Stomach The stomach is both a mechanical and chemical type of digestion. The digestive secretion and/or enzyme of in the stomach are: pepsin, hydrochloric acid, and mucus. The function of the stomach is digesting the food. Small Intestine The small intestine is a chemical type of digestion. There are no digestive secretion and/or enzyme. The function of the small intestine is that it receives partially digested foods from the stomach and absorbs all the nutrients in the bile from the stomach. Large Intestine The large intestine is neither mechanical or chemical, and also has no digestive secretion and/or enzyme. The function of the large intestine is the large amounts of water and salts are reabsorbed back into the blood. Gall Bladder The gall bladder is neither mechanical or chemical, and also has no digestive and/or enzyme. The function of the gall bladder is that it aids in digestion of proteins and carbohydrates. Pancreas The gall bladder is neither mechanical or chemical, and also has no digestive and/or enzyme. The function of the gall bladder is that it aids in digestion of proteins and carbohydrates. Liver The liver is neither mechanical or chemical, and also has a digestive secretion. The function of the liver is processing nutrients in food and distributing it to other organs so that they can function. Physical & Chemical Digestion Physical– Chewing and churning Chemical– Enzyme action How are Nutrients Absorbed Into the Blood? Circulatory system carries nutrients and oxygen to all body cells Cell are then nourished and renewed, obtaining the energy Blood in arteries carries oxygen and nourishment to cells Blood in veins is then passing through heart and into lungs, where it exchanges carbon dioxide for oxygen Nutrients are now absorbed into the blood Problems/Diseases of Digestive System (Gastritis & Gastroenteritis) A person that has ended up with gastritis may experience nausea, vomiting, abdominal discomfort, loss of appetite, bloating, and diarrhea. Gastritis can also cause bleeding (which may show up in your vomit) or the passage of black stools. You can prevent yourself from getting this disease by taking irritant such as alcohol or medicine. The treatment is to wait for the irritating substances to leave the stomach. Gastroenteritis is an inflammatory condition of the stomach and the intestine caused by infections or food poisoning. The symptoms of this disorder are: nausea, vomiting, abdominal cramping and tenderness, and diarrhea. The appear suddenly and without any warning. You can prevent yourself from getting this disease by getting any infections or food poisoning in your body. Doctors treat gastroenteritis by recommending that the patient rest in bed and begin a restricted diet.