Diagram of the human digestive system. Courtesy of Estrella Mountain
The digestive system is a group of organs that break down foods into chemical components that the body can absorb and use for energy, as well as for building and repairing cells and tissues. Principal components include:
- Mouth, including the salivary glands.
- Small intestine, including the pancreas, liver, and gallbladder as accessory organs.
- Large intestine.
The digestive system basically is a hollow tube with one opening in the mouth and the other in the anus. This form of organization is common to vertebrates and is referred to as a tube within a tube.
Additional Information about the Digestive System
Your Digestive System and How It Works from the National Institute of Diabetes and Digestive and Kidney Diseases (USA)
Your Digestive System from KidsHealth.org
Gastroesophageal Reflux Disease