what is the main function of insects???
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The circulatory system of insects serves a number of functions, including the transport of nutrients, salts, waste, and hormones throughout the body. It also acts like a very primitive immune system to generate wound-healing clots and to attack cells of infectious organisms that have entered the body such as bacteria
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Insects provide useful services to mankind and the environment in a number of ways. They keep pest insects in check, pollinate crops we rely on as food, and act as sanitation experts, cleaning up waste so that the world doesn't become overrun with dung.
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