GENERAL KNOWLEDGE

Detailed explanation-1: -Ibn al-Nafis had an insight into what would become a larger theory of the capillary circulation. He stated that “there must be small communications or pores (manafidh in Arabic) between the pulmonary artery and vein, ‘’ a prediction that preceded the discovery of the capillary system by more than 400 years.

Detailed explanation-2: -He is famous for providing the first description of the pulmonary circulation. He was the first person to challenge the long-held theory of the Galen (129-207 AD) School that blood could pass from the right to the left side of the heart through small pores in the interventricular septum.

Detailed explanation-3: -THE DISCOVERY OF PULMONARY CIRCULATION. In the thirteenth century during the time of Ibn al-Nafis, Galen’s theories on physiology had dominated medical thought for a thousand years.