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The respiratory system characteristics shared by fish, frogs, sponges, and earthworms are gas exchange across a moist respiratory surface.
Which organisms respire through their moist respiratory surface?
The moist respiratory surface of earthworms and amphibians like frogs is used for breathing. They belong to a class of land-dwelling creatures with skin that is permeable to gases. Earthworms, sponges, fish, and frogs may breathe through their permeable skin, which must be kept moist.
Earthworms reside underground in the wet soil, whereas amphibians are creatures that live in or near water. The skin of animals that can breathe through their skin is moist, and the capillaries, which are tiny blood veins, are located near the skin's surface. These little blood arteries supply oxygen to the body's numerous tissues and carbon dioxide to the epidermis.
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