The heart of the grasshopper is located in the pericardial sinus. It is composed of several funnel-shaped chambers. The first 3 chambers are located in the thorax and the last 10 chambers are located in the abdomen. In the region between the two chambers, the cardiac wall folds from both sides and enters the cardiac cavity. Each fold has a hole. It is called Ostia. Each chamber is connected to the pericardial sinus by ostia. A pore between two adjacent cells is called an intercellular pore.