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Why doesn't it make sense for grasshoppers to have high blood pressure?
Wiki User
∙ 11y ago
Grasshoppers have an open circulatory system. This means that blood (which, in insects, is called haemolymph) is pumped by the heart straight into sinuses that surround the grasshoppers muscles, tissue, and organs. Unlike us humans who have closed circulatory systems, blood isn't delivered throughout the body in blood vessels like veins and arteries (except for the aorta). When blood is delivered through vessels throughout the body, there is a force exerted on the vessel walls. This force is called blood pressure.
Grasshoppers don't have blood vessels throughout their bodies; all they have are the heart and aorta. Blood goes straight from the sinuses in the grasshopper's into the heart, and is pumped straight out of the aorta into the sinuses. The only pressure exerted is on the short aorta leading out of the heart-- and that's it. Because of this, they cannot have high blood pressures.
I'm not 110% sure if that's all correct, but I hope it helps. I'm doing a Biology assignment on the circulatory system of grasshoppers for high school right now, and I was looking for some answers myself... sucks when no one answers though, haha.
Wiki User
∙ 11y ago
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