Discuss the mechanisms for respiration in insects earthworm aquatic animals amphibians and birds
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The skin of the earthworms feels moist. That is why they are called slimy creatures. The reason behind their moist skin is that earthworm’s breathing organ is their skin. Air can easily pass through the skin of an earthworm. The exchange of gases usually takes place through its moist skin and capillaries. In these regions the oxygen gas is picked up by the haemoglobin dissolved in the blood and carbon dioxide is released out. Earthworms can also use their skin to move water and salts by active transport.
Interestingly, frogs can also use their skin to breathe. Although frogs have a pair of lungs to perform respiration, they often breathe through their skin.
In unicellular animals, such as amoeba, exchange of gases takes place through cell surface. They absorb oxygen from the surrounding air or water and give out carbon dioxide through plasma membrane by diffusion.
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