Question

the respiratory organs of cockroach earthworm, fish respectively​

Answer 1

Flatworms and the Earthworms breathe via their skin, unlike the mammals. Fish breathe underwater via gills. Cockroaches use neither gills nor the lungs. They breathe via a system of tubes connected to the spiracles.

Answer 2

Answer:

Cockroach:

Cockroaches can hold their breath for up to seven minutes. Their respiratory system is highly efficient but there are no lungs. Instead, the insects draw in air through external valves called spiracles and transport the air directly to the cells via tubes called trachea.

Earthworm:

Earthworms do not have lungs. They breathe through their skin. Oxygen and carbon dioxide pass through the earthworm's skin by diffusion.

fish:

Fish and other aquatic organisms use gills to take up oxygen dissolved in the water and diffuse carbon dioxide out of the bloodstream. Some insects utilize a tracheal system that transports oxygen from the external environment through openings called spiracles.

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