Ibn al-Nafis
1213–1288 — Syria
Era: Medieval
Brilliance: 9/10 | Stewardship: 8/10 | Composite Index: 72
Discovered pulmonary circulation centuries before Europe
"Blood must flow from the right to the left ventricle through the lungs, not through the heart's septum as previous physicians believed."
Biography
Ibn alNafis was a Syrian physician who made the revolutionary discovery of pulmonary circulation—how blood flows through the lungs—challenging Galen's 1,400yearold anatomical dogma. His meticulous observations and logical reasoning established him as a pioneer of experimental medicine in the medieval Islamic world. His work remained largely unknown to European medicine until the 16th century, fundamentally reshaping cardiovascular understanding.
Key Facts
- Discovered and accurately described pulmonary circulation in 1242, three centuries before European scientists
- Served as chief physician at al-Mansuri Hospital in Cairo, one of the medieval world's finest medical institutions
- Wrote Al-Mujiz fi al-Tibb (The Summary of Medicine), an influential medical encyclopedia
- Challenged Galen's erroneous belief that blood passed directly through the heart septum
- His anatomical insights were based on careful observation and logical deduction rather than dissection
Medieval Syrian doctor decoded how lungs move blood—400 years ahead of Europe.
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