蛙类是人们非常熟悉的两栖动物,它们大部分体型较小,性情温和,没有攻击性,而且主要捕食害虫,是对人类有益的动物。它们分布广泛,除南极洲以外全球均有分布,尤以温差小和湿度大的热带、亚热带为多。蛙类是比较低等的脊椎动物,它们的皮肤除了具有保护肌肉和内脏的作用以外,还兼有 Frogs are very familiar amphibians. Most of them are small in size, mild in temperament, non-aggressive, and mainly prey on pests and are beneficial to humans. They are widely distributed and distributed all over the world except Antarctica, especially in the tropical and subtropical regions where the temperature difference is small and the humidity is high. Frogs are relatively low-level vertebrates. Their skin has the function of protecting muscles and internal organs.