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.
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.