Al-Zahrawi invented over 200 surgical instruments, including scalpels, bone saws, forceps, and fine scissors for eye surgery. Many of these designs are still used in modern hospitals today.

Centuries before William Harvey, Ibn al-Nafis correctly described the Pulmonary Transit—how blood moves from the heart's right ventricle to the lungs for oxygenation and back to the left ventricle.

His book, Al-Qanun fi al-Tibb, was the standard medical textbook in European universities for 700 years. It systematized all known medical knowledge and introduced the concept of syndromes in diagnosis.

Muslims created the Bimaristan—the first true hospitals. Unlike ancient temples, these were secular institutions with separate wards for different diseases, pharmacies, libraries, and lecture halls for teaching students.

Islamic medicine established Pharmacy (Saydala) as a separate profession from Medicine. They introduced hundreds of new drugs, including camphor, senna, and myrrh, and developed methods like distillation to create purer medicines.

Al-Razi was the first physician to clinically distinguish between Smallpox and Measles. His book Al-Judari wa al-Hasbah is considered a masterpiece in clinical observation and pediatric medicine.

Muslim ophthalmologists performed complex cataract surgeries using a hollow needle (suction method) as early as the 10th century. Ibn al-Haytham's study of the eye's anatomy revolutionized vision science.

While Europe treated the mentally ill as "possessed," Muslim hospitals had dedicated wards for mental health. Patients were treated with music therapy, baths, and occupational therapy, recognizing mental illness as a medical condition.

During the Black Death plague, Ibn al-Khatib stated that diseases are spread by "minute bodies" (microbes) through contagion. He recommended isolation (quarantine) to stop the spread, centuries before germ theory was proven.