Blood of earthworm is
Red in colour, due to dissolved haemoglobin in corpuscle
Red in colour, due to dissolved haemoglobin in plasma
Blue in colour, due to dissolved haemocyanin in plasma
Blue in colour, due to dissolved haemocyanin in corpuscles
Circulatory System of Earthworm
Blood
In Earthworms, specialized kind of breathing devices are the present and respiratory exchange of gases occurs through the moist body surface into the bloodstream.
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The blood of earthworm is red due to the dissolution of hemoglobin into the plasma.