In which of the following animals, respiration occurs without any respiratory organ- a, earthworm b. Planaria
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option a is the right
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Earthworm is a creature in which respiration occurs without any respiratory organ.
The oxygen is full by the hemoglobin through the moist skin and it gets liquefied in the plasma of the blood.
The carbon dioxide is also come out in the same process.
In this way respiration occurs without any respiratory organ.
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