Another of the great anatomists of this period, second only in fame to Vesalius, was Eustachius, born about the beginning of the sixteenth century. He became physician to the Duke of Urbino, and in Rome a city physician and professor of anatomy, continuing to teach in the latter city until{109} overtaken by his final sickness. He was a defender of Galen rather than an opponent, and sought to shelter his reputation from the attacks of Vesalius. In his praise it must be said that, for his day, he was a great anatomist; his chief discoveries were in the domain of comparative anatomy. He brought to bear upon his work a knowledge of embryology which enabled him, for instance, to describe the kidneys and the teeth much more accurately than would otherwise have been possible; he noted, also the pathological changes in bodies dissected, and is brought daily to our minds as we think of the connecting channel between the pharynx and the middle ear, to which his name has been given. He died in 1574. [Illustration: 8129] Fallopius, born in Modena, in 1523, was professor successively at Ferrara, Pisa, and Padua. He cultivated anatomy with the greatest ardor, and, in consequence, his name is also linked with that of Vesalius, as are those of Herophilus and Erasistratus in the history of ancient anatomy. His anatomical researches included all parts of the human body, and his name has been given to the tube through which the ovum enters the cavity of the uterus. Death overtook him in the year 1562. Jerome Fabricius, better known as _Fabricius ab Aquapendente_, was born in the town of the latter name, near the southern end of the Apennines, in 1537, received his no early{110} education in Padua, and studied anatomy under Fallopius, whose assistant he also was. After the death of the latter he succeeded to the professorship of anatomy, and later built, at his own expense, a large anatomical theater, in which he lectured and demonstrated to students from all parts of the world. Toward the end of his life he had accumulated a large number of specimens, and published extensively on anatomy, embryology, physiology, and surgery. Though often accredited with discovering the valves of the veins, he is not entitled to that honor, since Erasistratus, Sylvius, Vesalius, and others had previously described them, Estiennes had seen them in the azygos veins, and Canano in other veins. His true claim to glory rests upon embryological researches, which he was the first to undertake in a comparative way. In _De Formato Foetu_ he elucidated the development of the embryo and its membranes by a long list of observations on lower animals of many species. He was probably the first to describe the uterine decidua. Fabricius died in 1619.