Which two classes are described as breathing by tracheae?

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Multiple Choice

Which two classes are described as breathing by tracheae?

Tracheal respiration uses a network of air-filled tubes that deliver oxygen directly to tissues, connected to the outside by spiracles. This system is common in many terrestrial arthropods beyond insects, including myriapods. Millipedes and centipedes rely on a tracheal network to supply gases to their cells, with spiracles opening to the environment and branching tubes reaching interior tissues. This direct delivery of air minimizes the need for large circulatory oxygen transport and allows these animals to live effectively on land. In contrast, many arachnids primarily use book lungs rather than a tracheal system, so they aren’t described as breathing by tracheae in the same sense. Therefore, the two classes described as breathing by tracheae are millipedes and centipedes.

Tracheal respiration uses a network of air-filled tubes that deliver oxygen directly to tissues, connected to the outside by spiracles. This system is common in many terrestrial arthropods beyond insects, including myriapods. Millipedes and centipedes rely on a tracheal network to supply gases to their cells, with spiracles opening to the environment and branching tubes reaching interior tissues. This direct delivery of air minimizes the need for large circulatory oxygen transport and allows these animals to live effectively on land. In contrast, many arachnids primarily use book lungs rather than a tracheal system, so they aren’t described as breathing by tracheae in the same sense. Therefore, the two classes described as breathing by tracheae are millipedes and centipedes.

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