Blood does not transport oxygen in

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(A) In $Cockroach$, the blood (hemolymph) lacks respiratory pigments like hemoglobin. Therefore, the blood does not play any role in the transport of

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Cockroach

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(A) In $Cockroach$, the blood (hemolymph) lacks respiratory pigments like hemoglobin. Therefore, the blood does not play any role in the transport of oxygen. Instead, oxygen is transported directly to the tissues through a system of air tubes called the tracheal system. In contrast, $Earthworms$ use hemoglobin dissolved in plasma, $Frogs$ use hemoglobin in red blood cells, and $Beetles$ (though insects) are often compared in broader contexts, but the $Cockroach$ is the classic example of an insect where the tracheal system is the sole respiratory mechanism.

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