Frogs live in 2 worlds, that frogs will live in water and on land. Frog features a body temperature changes, attributable to go with the temperature of their setting, so-called cold-blooded animals (poikiloterm). Frog circulatory system includes a closed circulation, as a result of blood flow through blood vessels. Frogs bear metamorphosis, the modification in body form and structure of the tool body. At the tadpole stage of gill respiration equipment. Frogs have niktitans membrane (lining up) that serves to sense the listener (capture sound vibrations). Limbs of the frog has 2 pairs of legs, hind legs longer than forelegs, thus it will be used to leap. Frogs breathe with lungs is assisted by the complete surface of the skin is moist. Having external fertilization. Example: the inexperienced frog, tree frogs.
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