Ibn Al Nafis said that blood from right heart cavity goes to the lung through the Arterialized Vein (Pulmonary Artery). In the lungs the blood divides into two: thin blood filters through pores of the arterialized vein (pulmonary Artery) and thick blood remains in the lung for its nutrition. The thin blood mixes with the air that comes from the trachea and enters the vein-like artery (pulmonary veins) through its wall. The thin blood mixed with air, reach the left heart cavity, the center where vital spirit form. The spirit moves from the left heart cavity to the aorta and the rest of the arteries to the tissues.
So Ibn Al-Nafis suggested that blood moves from Arteries to Veins across the wall inside the lungs, but his student, Ibn Al Quff, explained later in his book kitab al-omda fi sina'at altib, i.e., basic works concerning the art of surgery [12] , and proposed the existence of capillaries. This was not actually confirmed until the era of the microscope when Malphighi saw the capillaries in 1661.
Ibn Al Nafis also said that the heart muscles receive nourishment from the arteries [coronary arteries] that pass through it, not directly from the blood in the heart cavity as Galen claimed. He described his finding in his book Sharh Al Tashrih four hundred years before Harvey published "De Motu Cordis". Ibn Al Nafis' book was available for Harvey to see when he went to Italy to study in Padua University.
Ibn Al Nafis wrote more than twenty books, including Alshamil, a multivolume encyclopedia of medicine. He also wrote books on pediatrics and ophthalmology. He devoted one paper to the pulses.
Western writers admit that: "The Arabic teaching on the pulse became standard reference works, many of which have survived into the present day" [7] .
Until the death of Ibn Al Nafis in 1288, there was no mention of blood pressure or hypertension in the medical literature. A few centuries later, physiologists made the discovery.
sumber dari: heartviews.org
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