●●●●● ●●●● ● ntroduction: ●●0 ●●● ●●●● The gastrointestinal system is consisted of the gastrointestinal tract (mouth, pharynx, esophagus, stomach, small intestine, and large intestine)and the accessory organs(salivary glands, liver, gallbladder, and pancreas) that secrete chemical substances into gastrointestinal tract via connecting ducts. The overall function of the gastrointestinal system is to process ingested foods into small molecules and then transfer them, along with salts and water, to the body's internal environment, where they can be distributed to cells 08:11:56 上一页下一页放映结束08:11:56 消化 2 ⚫ Introduction: The gastrointestinal system is consisted of the gastrointestinal tract (mouth, pharynx, esophagus, stomach, small intestine, and large intestine) and the accessory organs (salivary glands, liver, gallbladder, and pancreas) that secrete chemical substances into gastrointestinal tract via connecting ducts. The overall function of the gastrointestinal system is to process ingested foods into small molecules and then transfer them, along with salts and water, to the body's internal environment, where they can be distributed to cells. 上一页 下一页 放映结束