Ala-al-din abu Al-Hassan Ali ibn Abi-Hazm al-Qarshi al-Dimashqi, known as Ibn al-Nafis (Arabic: ابن النفيس ), was an Arab physician mostly famous for being the first to describe the pulmonary circulation of the blood. The work of Ibn Al-Nafis regarding the right sided (pulmonary) circulation pre-date the much later work (1628) of William Harvey’s De motu cordis. Both theories attempt to explain circulation.
Apart from medicine, Ibn al-Nafis learned jurisprudence, literature and theology. Ibn al-Nafis was an expert on the Shafi’ischool of jurisprudence and an expert physician. Ibn al-Nafis also performed several human dissections during the course of his work. The number of medical textbooks written by Ibn al-Nafis in his lifetime is estimated at more than 110 volumes.