He made use of his anatomical knowledge in his artwork, making many sketches of skeletal structures, muscles and organs of humans and other vertebrates that he dissected.
hiː mˌeɪd jˈuːs ʌv hɪz ˌænɐtˈɑːmɪkəl nˈɑːlɪdʒ ɪn hɪz ˈɑːɹtwɜːk, mˌeɪkɪŋ mˈɛni skˈɛtʃᵻz ʌv skˈɛlᵻɾəl stɹˈʌktʃɚz, mˈʌsəlz ænd ˈɔːɹɡənz ʌv hjˈuːmənz ænd ˈʌðɚ vˈɜːɾɪbɹˌeɪts ðæt hiː dˈaɪsɛktᵻd.