how does respiration take place in insect
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The tracheoles end within the body cells. Gases move by diffusion within the tracheal system. When the insect is less active the ends of the tracheoles contain fluid. It is where the fluid and gas meet (= the fluid/gas interface), that exchange of gases occurs (oxygen is taken up, carbon dioxide is given off).
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respiration in animals takes place through opening called spiracles they are present on the sides of their body. spiracles are connected to air tubes called trachea
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