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because if they dident then non of the vitamins or minerals from the food eaten could be extracted and taken around the body, also if they dident digest the food would stay in the stomach and just stay there, therefore eventually they would not be able to eat any more (as the food is just sitting in the stomach and it will fill because its not going anywhere) which will mean they will die, also if food is left rotting in the stomach then the animal would also gain poisons from all the decay and this would be sent around the body and also eventually kill the animal.
What else can I help you with?
Do amphibians have a digestive system?
Yes, all animals have a digestive system.
What are he steps of the digestive system for mussels?
Most animals like this are thought to have no digestive system
Which organ system of plants and animals different?
Digestive system
Why is the muscular system necessary for the circulatory and digestive system to function?
mjf
Why is it necessary that blood is pumped to the digestive system?
Blood has to be pumped to the digestive system so that carbon dioxide can be extracted from it. The blood can also absorb nutrients that have just been collected from the digestive system.
Can animals get heartburn?
yes animals can get heartburn since so animals have the same type of digestive system
Why it is necessary for animal to have teeth?
Because mammals have different ways to eat there food but they eat the same by the mouth.
Which system does the liver of a frog belong to?
Livers of all animals belong to the digestive system.
Does a cow's digestive system involve chemistry?
Yes, a cow's digestive system involves chemistry. The digestive processes of all animals involve some type of chemical digestion.
Why is a digestive system not needed in a tapeworm?
Tapeworms feed on already digested food as they live in the gut (stomach). Therefore a digestive system isn't necessary.
How is the digestive system related to the muscular?
The smooth muscles in the intestines push the materials through itself and the digestive system provides the necessary protein and energy the muscle system needs.
Which of the molecules above cannot be hydrolyzed by the digestive system of most animals starch glycogen sucrose or cellulose?
Cellulose cannot be hydrolyzed by the digestive system of most animals because they lack the necessary enzyme, cellulase, to break down its β-glucosidic bonds. While starch and glycogen can be digested by animals due to their α-glucosidic bonds, sucrose can be hydrolyzed by the enzyme sucrase. Therefore, cellulose is the molecule that most animals cannot digest.
