century bce herophilos erasistratus produced accurate anatomical descriptions based vivisection criminals alexandria ptolemaic dynasty ref name bodies ref nd century galen pergamum anatomist clinician writer philosopher ref name britbrit galen wrote final highly influential anatomy treatise ancient times ref name pmid ref compiled existing knowledge studied anatomy dissection animals ref name britbrit galen ref one first experimental physiologists vivisection experiments animals galen 's drawings based mostly dog anatomy became effectively anatomical textbook next thousand years ref name boas work known renaissance doctors
Natural science Biology Anatomy