To compensate for their thin and delicate skin, amphibians have evolved mucous glands, principally on their heads, backs and tails.
tə kˈɑːmpənsˌeɪt fɔːɹ ðɛɹ θˈɪn ænd dˈɛlᵻkət skˈɪn, æmfˈɪbiənz hæv ɪvˈɑːlvd mjˈuːkəs ɡlˈændz, pɹˈɪnsɪpəli ˌɔn ðɛɹ hˈɛdz, bˈæks ænd tˈeɪlz.