The digestive system consists of the gastrointestinal tract, also called the gastrointestinal tract or digestive tract, and the liver, pancreas, and gall bladder. The gastrointestinal tract is a series of hollow organs joined together in a long, twisted tube from the mouth to the anus. The hollow organs that make up the gastrointestinal tract are the mouth, esophagus, stomach, small intestine, large intestine, and anus. The liver, pancreas, and gall bladder are the solid organs of the digestive system.
The digestive system includes the digestive tract and its accessory organs, which process food into molecules that can be absorbed and used by the body's cells. Food is broken down, little by little, until the molecules are small enough to be absorbed and waste products are eliminated. The digestive tract, also called the food tube or gastrointestinal (GI) tract, consists of a long, continuous tube that extends from the mouth to the anus. It includes the mouth, pharynx, esophagus, stomach, small intestine, and large intestine.
The tongue and teeth are accessory structures located in the mouth. The salivary glands, liver, gallbladder, and pancreas are the main accessory organs that play a role in digestion. These organs secrete fluids into the digestive tract. Nutrient-rich blood goes directly to the liver for processing.
The liver filters out harmful substances or wastes and converts some of the waste into more bile. The liver even helps determine how many nutrients will go to the rest of the body and how many will remain stored. For example, the liver stores certain vitamins and a type of sugar that the body uses for energy. You have nerves that connect the central nervous system, brain, and spinal cord to the digestive system and control some digestive functions.
However, your cecum, an organ with pouches at the beginning of the large intestine that contains many microorganisms necessary for the digestion of plant materials, is large and is where forage is fermented and digested. When digesting proteins and some fats, the stomach lining must be protected from being digested by pepsin. The National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK) and other components of the National Institutes of Health (NIH) conduct and support research on many diseases and conditions. The digestive enzymes of these animals cannot break down cellulose, but the microorganisms present in the digestive system can.
Working together, nerves, hormones, bacteria, blood, and organs in the digestive system digest the foods and liquids you eat or drink every day. The muscles of the small intestine mix food with the digestive juices of the pancreas, liver, and intestine and push the mixture forward for further digestion. This content is provided as a service of the National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK), which is part of the National Institutes of Health. Animals have developed different types of digestive systems to help digest the different foods they consume.
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