Question

Which of the following is not matched incorrectly?

• A. Open system - Hemolymph, Closed system - Blood.
• B. Open system - Hemocoel, Closed system - Vessels.
• C. Open system – Sinuses, Closed system - Capillaries.
• D. Open system - Consumes more energy, Closed system - Consumes less energy.

Answer 1

The correct option is D

Open system - Consumes more energy, Closed system - Consumes less energy.

The circulatory system of insects differs from that of vertebrates and many other invertebrates in being "open". In insects, "blood" is confined to vessels during only a portion of its circuit through the body. The remainder of its journey takes place within the body cavity (called the hemocoel). For this reason, insect "blood" is called hemolymph. The hemocoel is divided into chambers called sinuses. An open circulatory system does not use as much energy to operate and maintain, as a closed system does.