Explain the brething machanism of cockroach and earthworms.
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The breathe air; dissolved in water; through gills. BREATHING IN COCKROACH: Cockroach and other insects breathe through spiracles and tracheae. ... These pores are called spiracles. BREATHING IN EARTHWORM: Earthworms breathe through their skin.
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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.
They breathe through their skin. Air dissolves on the mucus of their skin, so they MUST stay moist to breathe. If worms dry out, they suffocate. As fresh air is taken in through the skin, oxygen is drawn into the worm's circulatory system, and the worm's hearts pump the oxygenated blood to the head area.
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