The alimentary canal of grasshopper is equipped with a structure called Gizzard. The food (mainly leaves) gets churned in Gizzard first before it goes further for digestion and assimilation.Digestion starts at the mouth with the mandibles and the maxillae chewing the food. It is also acted upon by enzymes of salivary juice, the salivary carbohydrases which partially digest the food. The food is then swallowed with the help of lubrication provided by the salivary juice.The food then enters the oesophagus and then into the crop. Here, the masticated food is temporarily stored.The food then passes into the gizzard which acts as the grinding chamber. At the junction of the gizzard and the stomach is a valve called the pyloric valve. It allows the passage of only the thoroughly digested food into the stomach and also, prevents the regurgitation of food from the stomach.