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 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.
This Fabricius must not be confused with the almost-as-renowned Fabricius Hildanus, who was born in Hilden, near Düsseldorf, in 1560. Under the German name of Wilhelm Fabry he became widely known as a surgeon, and, after traveling through France, settled in Hilden, but later moved to Cologne, where he founded an academy. His first treatise—on gangrene and sphacelus—quickly made him known, and went through eleven editions. From Cologne he went successively to Genf, Lausanne, and Polen; returned to Cologne; and finally, after several other visits, settled in Bern, where he died of gout and asthma (in 1634.). His frequent changes of location were, perhaps, less the result of instability than a testimony to his reputation, inasmuch as he was invited from one place to another. He has been, with propriety, named the "German Paré," since he rendered such great service to German surgery, and was not only an expert therein, but likewise a cultivated physician and polished humanitarian; in fact he was ahead of his time, by many years, in these regards, as is shown by his recommending amputation in cases of gangrene, and his writings concerning gunshot wounds. He enjoyed a ripe experience also in obstetrics, and even instructed his wife in the obstetric art and praised her ability most highly. His most important contributions to literature were in the field of surgery, and these passed through numerous editions, while his opinions and practice are quoted even to-day.
During this epoch many modifications were introduced and improvements made in the teaching of medicine. Permanent amphitheaters were established for dissection, and chairs of anatomy created, their incumbents being paid out of the public treasury. The popes, appear to have taken the initiative in this respect, which accounts for the great number of subjects with which Eustachius was supplied, as compared with Vesalius, who obtained only two or three in a year. Up to this time the razor had been the sole instrument of dissection, but was now replaced by the scalpel, which remains in use to-day. By the labors of the few men mentioned anatomy acquired a degree of perfection which it had never attained under the Greeks. Skillful artists put their labors upon paper, and plates and descriptions made from anatomical preparations represented the various parts of the human body with more fidelity than had been supposed possible. Nerves, tendons, and ligaments were no longer confused, but traced so far as possible from origin to ramifications. Ancient errors generally were corrected. It was proven that there was no bony structure in the tissue of the heart, that the partition between its cavities was not porous; and attentive examination of its valves led to the discovery of the lesser circulation by Columbus. Michael Servetus, whom John Calvin burned at the stake, was perhaps the first to note this phenomenon. He saw that the blood could not penetrate directly from the right into the left cavity of the heart, but that it was necessary for the whole fluid to pass through the lungs, where it became impregnated with the vital spirit of the atmosphere, and reached afterward the left auricle; the position of the valves in the pulmonary arteries and veins clearly confirmed his conjecture. Moreover the size of the pulmonary arteries was enormous, and disproportionate to the quantity of blood necessary for the nutrition of the lungs, which seemed to prove that this was not, as had been believed, the sole purpose of those vessels. It was about this time that Fabricius ab Aquapendente pointed out valves in veins in various parts of the body, and that Columbus and Andreas Cesalpinus explained more fully the mechanism of the lesser circulation; in fact, the former so closely approached an appreciation of the purpose of the vascular system that some have thought he really knew it, but the passages in his writings thought to sustain this opinion are not at all conclusive. He seems to have confused the action of the heart during sleep with that during the waking hours; and although he realized that the blood could not flow backward through the arteries, that the vena cava was the only vessel which permitted the entrance of blood into the heart, and though he spoke of anastomosis between arteries and veins and remarked that if a band be applied around a limb the veins swell below the ligature, he contented himself with comparing the motion of the blood with the flux and reflux of Euripus, as Aristotle had done. It is even thus that he tortured his mind in trying to reconcile two irreconcilable theories,—i.e., the opinion of the ancients on the motion of the blood and recent discoveries in the anatomy of the vascular system.