These two physicians helped pioneer human dissection for medical research, using the cadavers of condemned criminals, which was considered taboo until the Renaissance—Herophilus was recognized as the first person to perform systematic dissections.
ðiːz tˈuː fɪzˈɪʃənz hˈɛlpt paɪənˈɪɹ hjˈuːmən daɪsˈɛkʃən fɔːɹ mˈɛdɪkəl ɹᵻsˈɜːtʃ, jˈuːzɪŋ ðə kɐdˈævɚz ʌv kəndˈɛmd kɹˈɪmɪnəlz, wˌɪtʃ wʌz kənsˈɪdɚd tæbˈuː ʌntˈɪl ðə ɹˈɛnəsˌɑːns—hˈiəɹoʊfˌɪləs wʌz ɹˈɛkəɡnˌaɪzd æz ðə fˈɜːst pˈɜːsən tə pɚfˈɔːɹm sˌɪstəmˈæɾɪk daɪsˈɛkʃənz.