Answer:
Insects have a complete digestive system this means food is procesed in a tube like enclosure, called the alimentary canal.
When an insect eats saliva is being mix with the food. This is the first step off digesting. Next the food comes to the foregut, here you find int.al. the crop where food is stored until it can be processed futher. In some insects the crop end in the so called proventriculus where dentricles can grind the food
Now the food reaches the midgut. Here enzyms are secreted and water and nutrients are absorbed. The hindgut is the last part of the digestive system in this part most of the water is absorbed (90%).