Learn about the Digestive System in this educational video from dizzo95.
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Learn about the Digestive System The body’s digestive system is like a processing plant breaking down complex raw materials food containing proteins, fats and carbohydrates into more usable products like amino acids, fatty acids, glycerol and simple sugars. The digestive products are then transported from the main plant to another plant the liver. Where they’re use as fuel to produce energy and to manufacture components for repair and growth. Like the processing plant, the digestive system use specialized units to complete specific tasks. Upon entry into a person’s mouth, the teeth cut, tear, crush and grind food. In the mouth, salivary glands respond to the thought or presence of food by producing a fluid containing mucus and the enzymes amylase and maltase. The tongue mixes the food and rolls into a soft ball the bolus which it pushes toward the esophagus. Passing through the esophagus the bolus is dropped into the stomach where gastric glands once they’re creating digestive enzymes and the others are creating hydrochloric acid begin to break the food down into smaller pieces. The stomach wall discharges mucus during this face to protect itself against the action of the gastric acid. From there, the food passes into the small intestine through the pylorus, a sphincter muscle that controls the flow of food. The intestinal wall releases enzymes which digest proteins, fats and carbohydrates. Light and lymph vessels which supply the small intestine take away the final products of digestion. The lymphatic transport the fats around the body and finally release them into the bloodstream. Blood takes sugar and amino acids to the liver, the hepatic portal vein. The pancreas like the small intestines secretes enzymes in an alkaline juice to digest proteins, fats and carbohydrates. It also manufactures hormones which regulate the blood sugar level. From the small intestine, the digested food is received by the liver which manufactures bile for the gallbladder. The gallbladder stores and discharges bile which helps to breakdown fats into minute droplets. Undigested food from the small intestine is then passed into the large intestine. There, blood vessels supplying the large intestine carry away water extracted from the undigested waste. After passing through the large intestine the ileocecal valve prevents digested food from returning to the small intestine. Undigested food is eliminated from the system through the anus.