The gastrointestinal tract, also defined as the GI tract or digestive tract, as well as the liver, pancreas, and gallbladder, are depicted in this digestive system worksheet. The GI tract comprises hollow organs linked together by a long, twisting tube that runs from the mouth to the anus. The digestive tract includes hollow organs like the mouth, esophagus, stomach, small, large, and anus. The liver, gallbladder, and pancreas are the solid organs of our digestive system. There are three major sections of the small intestine. The duodenum is the initial part of the digestive tract. The ileum is at the bottom, and the jejunum is in the center. According to this digestive system worksheet, the appendix, the cecum, colon, and rectum are all part of the large intestine.