Final answer:
The digestive system is composed of organs that form a long tube called the gastrointestinal tract. It includes the mouth, esophagus, stomach, and small and large intestines. Accessory organs such as the pancreas and liver also play a role in digestion.
Step-by-step explanation:
The digestive system consists of several main organs including the mouth, esophagus, stomach, and small and large intestines — that form a long tube called the gastrointestinal (GI) tract. Food moves through this tract where it is digested, its nutrients absorbed, and its waste products excreted. The digestive system also includes accessory organs (such as the pancreas and liver) that produce enzymes and other substances needed for digestion but through which food does not actually pass.