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Is done through tubes called, Malpighian tube, in which blood filtration occurs collecting waste substances that are to the intestine.

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The respiratory system in insects is called the tracheal system. It involves the diffusion of oxygen directly from the atmosphere into the air-filled tubes. In addition, the diffusion is through air , is more efficient than the diffusion through water (300,000 times more) or skin (1,000,000 times more).

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Insect External and Internal Structures and Functions

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Insects such as grasshoppers, have, like the earthworm, a mouth, esophagus, a crop, gizzard, a stomach, intestine, rectum and anus. Unlike the earthworm's digestive system grasshopper is more complex, since it has specialized organs, such as salivary glands and gastric glands, which secret digestive enzymes

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Circulation is carried out by the circulatory systems:

OPEN: The circulating fluid flows through the body cavity and

bathes the internal organs directly.

CLOSED: The blood always circulartes inside blood vessels.

In a simple circulatory system , the blood only passes through the heart

once. in a double circulatory system , the blood passes through the heart twice