RT Book, Section A1 Ash, Rick A1 Morton, David A. A1 Scott, Sheryl A. SR Print(0) ID 1141045595 T1 DIGESTIVE SYSTEM T2 The Big Picture: Histology YR 2017 FD 2017 PB McGraw-Hill Medical PP New York, NY SN 9780071477581 LK accessbiomedicalscience.mhmedical.com/content.aspx?aid=1141045595 RD 2024/04/19 AB The digestive system consists of the gastrointestinal (GI) tract (or gut), which includes the oral cavity (mouth), esophagus, stomach, small intestine, and large intestine, and the accessory organs, which include the salivary glands, pancreas, liver, and gallbladder. The major function of the digestive system is to acquire nutrient molecules from ingested food and eliminate indigestible remnants. The digestive system also maintains a barrier between the contents of its lumen and body tissues and provides immune protection against infectious disease. The activities of the digestive system are regulated by the enteric nervous system and by both local and systemic hormones.