Grasshoppers have an open circulatory system, unlike Lobsters, where the heart is a sequence of chambers along the aorta that runs the length of a grasshopper's body. This makes blood easily accessible to all parts of the body. Like the Lobster, Grasshoppers also have valves called ostia. The ostia valves, just like in the lobster, only promote one-way flow of blood. Inside the body, muscles push blood forward through each of these chambers of the heart and along the aorta. The blood finds its way back to the heart through something called the alimentary canal, which also runs the length of the grasshopper's body, like the aorta. Once the blood reaches the necessary places, it re-enters the heart through the aorta, so the process can happen again.