Also, digestion and absorption in the grasshopper occur in the stomach, but in the earthworm they take place in the intestine. Both of these organisms only go through peristalsis, where in a human, reverse peristalsis can occur. On the other hand, the grasshopper lacks a pharynx, which the earthworm has.he digestive systems of the grasshopper and the human are alike in some ways. They both contain salivary glands, a stomach and a rectum. Although the human lacks a crop, gizzard, and typhlosoles. But, the small and large intestine of the human are large enough to do the same work as the typhlosoles in the grasshopper.