Harvey demonstrated the circulation of the blood, establishing that the heart functioned as a pump rather than being the seat of the soul and the controller of the body's heat, as Aristotle thought.
hˈɑːɹvi dˈɛmənstɹˌeɪɾᵻd ðə sˌɜːkjʊlˈeɪʃən ʌvðə blˈʌd, ɪstˈæblɪʃɪŋ ðætðə hˈɑːɹt fˈʌŋkʃənd æz ɐ pˈʌmp ɹˈæðɚ ðɐn bˌiːɪŋ ðə sˈiːt ʌvðə sˈoʊl ænd ðə kəntɹˈoʊlɚɹ ʌvðə bˈɑːdiz hˈiːt, æz ˈæɹɪstˌɑːɾəl θˈɔːt.