The Alimentary System College of Life Sciences Yuting Cui
The Alimentary System College of Life Sciences Yuting Cui
Introduction Every cell in the body requires a constant source of energy in order to perform its particular functions-these functions are contraction,secretion,synthesis,or any other.Ingested food provides the basic materials from which this energy is produced and new molecules are synthesized. Most food,however,cannot enter the bloodstream and be used by the cells of the body until it is broken down into simpler molecules
Introduction Every cell in the body requires a constant source of energy in order to perform its particular functions—these functions are contraction, secretion, synthesis, or any other. Ingested food provides the basic materials from which this energy is produced and new molecules are synthesized. Most food, however, cannot enter the bloodstream and be used by the cells of the body until it is broken down into simpler molecules
Introduction The digestive system alters the ingested food by mechanical and chemical processes so that it can ultimately cross the wall of the gastrointestinal tract and enter the blood vascular and lymphatic systems.The vascular system then carries these food molecules through the hepatic portal vein to the liver before distributing them to cells throughout the body.After entering the cells,the digested food molecules may be reassembled into proteins,carbohydrates,and lipids,or they may be used in the production of energy to support body activity
Introduction The digestive system alters the ingested food by mechanical and chemical processes so that it can ultimately cross the wall of the gastrointestinal tract and enter the blood vascular and lymphatic systems. The vascular system then carries these food molecules through the hepatic portal vein to the liver before distributing them to cells throughout the body. After entering the cells, the digested food molecules may be reassembled into proteins, carbohydrates, and lipids, or they may be used in the production of energy to support body activity
Introduction Constitution: 1.Alimentary canal and certain accessory organs. 2.Alimentary glands. The alimentary system (or digestive system)comprises the alimentary canal (gastrointestinal tract)and certain accessory organs including lips and cheeks,palate,tongue,and teeth,as well as glands(salivary glands,liver and pancreas)
Introduction Constitution: 1. Alimentary canal and certain accessory organs. 2. Alimentary glands. The alimentary system (or digestive system) comprises the alimentary canal (gastrointestinal tract) and certain accessory organs including lips and cheeks, palate, tongue, and teeth, as well as glands (salivary glands, liver and pancreas)
