The lungs in amphibians are primitive compared to those of amniotes, possessing few internal septa and large alveoli, and consequently having a comparatively slow diffusion rate for oxygen entering the blood.
ðə lˈʌŋz ɪn æmfˈɪbiənz ɑːɹ pɹˈɪmᵻtˌɪv kəmpˈɛɹd tə ðoʊz ʌv ˈæmnɪˌoʊts, pəzˈɛsɪŋ fjˈuː ɪntˈɜːnəl sˈɛptə ænd lˈɑːɹdʒ ˈælvɪˌɑːli, ænd kˈɑːnsɪkwəntli hˌævɪŋ ɐ kəmpˈæɹətˌɪvli slˈoʊ dᵻfjˈuːʒən ɹˈeɪt fɔːɹ ˈɑːksɪdʒən ˈɛntɚɹɪŋ ðə blˈʌd.