I'm not sure how to interpret the question.
The entire is called the Digestive System and is complete, fairly complex, set of separate organs joined by various ducts of their own, and the Circulatory System.
Some of these organs, especially the intestines, are held within a membranous bag called the Peritoneum - if that's the cover you mean.
Greater Omentum
Digestive organs working together is called the digestive system.
Digestive system.
organ system
gall bladder
The organ system breaks down.
An organ is one structure that performs a specific function(ex. stomach) and an organ system is a group of organs(ex. digestive system)
visceral peritoneum
Greater Omentum
Cell make up tissues,tissues make up organs and organs make up organ systems, and organ systems make a whole organism
A system, such as the digestive system, is composed of several organs. The digestive system includes the stomach, the small intestine, the large intestine, the liver and the pancreas, and a few other organs.
The digestive system is an organ system because it consists of many organs: the, mouth, esophagus, stomach, pancreas, gall bladder, small intestine, large intestine, rectum, and anus. All of these organs play a role in the digestive system.