His distinction between the arteries and veins—the arteries carrying the air through the body, while the veins carried the blood from the heart was a great anatomical discovery.
hɪz dɪstˈɪŋkʃən bᵻtwˌiːn ðɪ ˈɑːɹɾɚɹiz ænd vˈeɪnz—ðɪ ˈɑːɹɾɚɹiz kˈæɹiɪŋ ðɪ ˈɛɹ θɹuː ðə bˈɑːdi, wˌaɪl ðə vˈeɪnz kˈæɹid ðə blˈʌd fɹʌmðə hˈɑːɹt wʌzɐ ɡɹˈeɪt ˌænɐtˈɑːmɪkəl dɪskˈʌvɚɹi.