why is respiration in insects called direct respiration?
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1) Respiration in Insects is called direct because (a) the cells exchange directly with the air in the tubes (b) the tissues exchange directly with coelomic fluid (c) the tissues exchange directly with the air outside through body surface (d) tracheal tubes exchange directly with the haemocoel which ...
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Explanation:
respiration in insects called direct because air passes direct to tubes and to coalomic
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