What is Digestive system?
Digestive system meaning The organs that take in food and turn it into products that the body can use to stay healthy. Waste products the body cannot use leave the body through bowel movements. The digestive system includes the salivary glands, mouth, esophagus, stomach, liver, pancreas, gallbladder, small and large intestines, and rectum. There are other accessory organs and structures derived from the primitive gut and located in either the main digestive tract or opening into it. These include the tongue, teeth, gums, salivary glands, pancreas, gallbladder, bile ducts, liver, and appendix.The walls of most of the organs of the gastrointestinal tract are made up of three main layers of tissue: mucosa, submucosa and the muscularis propria. Most of the organs have a serosa or covering layer of visceral peritoneum which invests the organ to a varying extend depending on the particular segment of the organ and its mesenteric attachments.