Insects have a large blood vessels on the back of the trunk. Some grow more blood vessels, called cardiac function and blood pump based on blood vessels. Certain blood vessels infiltrate the space inside the trunk, according to the difference of blood is exposed to the direct tissue and substance Exchange. Blood tissue and will flow back to the heart by the contraction of muscles and trunk. Best shrimp has a circulation that is different from their little insects. That is, there is your heart on the head only. The blood from the heart to be one. flows through the gums to the external water, gas exchange, then flow back into the heart to the tissues of the body parts.
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