I want to know the answer to the following question:
Who theorized about pulmonary circulation?
All the background I'm provided with is that "Abu al-Qasim al-Zahrawi (also known as Abulcasis) contributed to the discipline of medical surgery with his Kitab al-Tasrif ("Book of Concessions"), a medical encyclopedia which was later translated to Latin and used in European and Muslim medical schools for centuries.". Is that enough to answer the question?
Answer: no