Reptiles are unable to use their skin for respiration as do amphibians and have a more efficient respiratory system drawing air into their lungs by expanding their chest walls.
ɹˈɛptaɪlz ɑːɹ ʌnˈeɪbəl tə jˈuːz ðɛɹ skˈɪn fɔːɹ ɹˌɛspᵻɹˈeɪʃən æz dˈuː æmfˈɪbiənz ænd hæv ɐ mˈoːɹ ɪfˈɪʃənt ɹˈɛspɹətˌoːɹi sˈɪstəm dɹˈɔːɪŋ ˈɛɹ ˌɪntʊ ðɛɹ lˈʌŋz baɪ ɛkspˈændɪŋ ðɛɹ tʃˈɛst wˈɔːlz.