Identify the individual who was responsible for explaining the circulatory system.

Here are the lists of the individuals who were responsible for the explanations of the respiratory system:
=> Ancient Egyptian Medical papyrus (16th century BCE)
=> Sushruta in ancient India (16th Century BCE)
=> Physician of Hippocratean (4th Century BC) and Herophilus
=> Erasistratus, a greek anatomis
=> Galen, a greek Physician (2nd century AD Rome)
=> Avicenna, a Persian Physician (1025)
=> Ibn al-Nafis, An arabian Physician
=> Micheal Servetus
=> William Harvey, a student of Hieronymus fabricus