During the Dark Ages following the fall of the Roman Empire, the Arabi
c world was instrumental in fostering the development of the sciences,
including medicine. The quest for original manuscripts and their tran
slation into Arabic reached its climax in the House of Wisdom in Baghd
ad, and the dissemination of the compiled texts was facilitated by the
introduction of paper from the East. Foremost among the Arabic physic
ians were Rhazes, Avicenna, Haly Abbas and Albucasis, who lived during
the period 950-1050 AD. Their writings not only followed Hippocrates
and Galen, but also greatly extended the analytical approach of these
earlier writers. The urine was studied and the function and diseases o
f the kidneys described. Despite the fact that experimentation on the
human body was prohibited by religion, some anatomic dissection and ob
servation seems to have been undertaken, and the pulmonary circulation
was described by Ibn Nafis. Anatomic illustrations began to appear in
Arabic texts, though they did not have the detail and artistic merit
of those of Vesalius.