Final answer:
A grasshopper has an open circulatory system, not a closed circulatory system.
Step-by-step explanation:
A grasshopper has an open circulatory system, not a closed circulatory system.
In an open circulatory system, the blood is not enclosed in blood vessels but is pumped into a hemocoel, which then circulates around the organs and re-enters the heart through ostia. This system is less controlled and structured compared to a closed circulatory system, but it allows for efficient transportation of nutrients and waste products.
In contrast, a closed circulatory system, like the one observed in birds and other vertebrates, has blood contained within blood vessels. The blood circulates unidirectionally from the heart around the systemic circulatory route and then returns to the heart. The closed circulatory system is more energy-intensive but allows for precise regulation and control of blood flow.