Why, when you step on a cockroach or smash a fly, the blood appears colorless?

by Helen
(Clarksdale, MS)

When you step on a cockroach or smash a fly, the blood appears colorless because...

Answers for Why, when you step on a cockroach or smash a fly, the blood appears colorless?

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Blood
by: Umer Parvez

This is due to that in the cockroach the circulatory system is open and the circulatory fluid does not contain hemoglobin and therefore it appears colourless.

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