He was admitted to the University of Padua where he made his first discovery in 1548, at the age of nineteen, when he described the elevator muscle of the upper eyelid. Later, at the University of Bologna, he received a doctorate in medicine in 1556 and was appointed a lecturer in medicine and surgery shortly thereafter at the age of twenty-seven. In 1570, surgery and anatomy were separated into separate professorships at his instigation and he held the newly created chair in anatomy for thirty-three years until his death in 1589.

From Aranzio came the first correct account of the anatomical peculiarities of the foetus, and he was the first to show that the muscles of the eye do not, as was previously imagined, arise from the dura mater but from the margin of the optic hole. He also, after considering the anatomical relations of the cavities of the heart, the valves and the great vessels, corroborated the views of Realdo Colombo regarding the course which the blood follows in passing from the right to the left side of the heart.

Aranzio is the first anatomist who describes distinctly the inferior cornua of the ventricles of the cerebrum, who recognizes the objects by which they are distinguished, and who gives them the name by which they are still known (hippocampus ) in 1564; and his account is more minute and perspicuous than that of the authors of the subsequent century. He speaks at length of the choroid plexus, and gives a detailed description of the fourth ventricle, under the name of cistern of the cerebellum, as a discovery of his own. He also was the first to discover that the blood of mother and foetus remain separate during pregnancy.

Bibliography

• De humano foetu opusculum, Rome, 1564; Venice, 1571; Basel, 1579. 32: De formato foetu. Bononiae, J. Rubrius, 1564.
• De tumoribus secundum locus affectum. Bologna, 1571.
• In Hippocrates librum de vulneribus capitis. Leiden, 1580.
• Observationes anatomicae. Basel, 1579; Venice 1587.

Thse works were published together in Venice in 1587:

• De tumoribus prater naturam secundum locos affectus liber.
• De humano foetu liber.
• Anatomicarum observationum liber.

External links

• Who Named It?