William Harvey and the Revolution of Blood Circulation

William Harvey, a pioneering figure in the history of medicine, was born on April 1, 1578, in Folkestone, Kent, to a family of merchants. Educated initially at King's College, Canterbury, he later pursued his studies at Cambridge University before embarking on a transformative journey to the University of Padua to delve deeper into the field of medicine.

Upon his return to England in 1602, Harvey commenced his career as a physician, leveraging his acquired knowledge and skills. His marriage to Elizabeth Browne, daughter of Queen Elizabeth I's physician, in 1604 not only strengthened his personal ties but also facilitated his professional advancement.

In 1607, Harvey was elected as a fellow of the Royal College of Physicians, marking the beginning of a distinguished trajectory in the medical realm. Subsequently, in 1609, he assumed the position of physician at St Bartholomew's Hospital, a role that provided him with ample opportunities for clinical practice and research.

His pivotal role in the medical community was solidified when he became the personal physician to James I in 1618, later extending his services to James' successor, King Charles I. Both monarchs took a keen interest in Harvey's inquiries and provided unwavering support, enabling him to pursue his groundbreaking research endeavors.

Harvey's relentless pursuit of knowledge led him to challenge established theories, particularly those concerning the circulation of blood in the human body. While prevailing wisdom attributed blood movement to the lungs, Harvey embarked on a scientific investigation to unravel the mysteries of circulation.

Through meticulous dissections and physiological experiments on animals, Harvey made groundbreaking discoveries. His observations of the heart's structure revealed the presence of valves, elucidating their role in facilitating unidirectional blood flow. Contrary to Galenic teachings, Harvey demonstrated through live animal experiments that blood was not transferred between ventricles but circulated in a continuous loop.

Furthermore, his meticulous dissections unveiled the absence of perforations in the heart's septum, dispelling misconceptions regarding blood passage. By ingeniously removing a beating heart from a living animal and observing its continued pulsations, Harvey conclusively proved the heart's function as a pump, not a suction mechanism.

In 1616, Harvey presented his revolutionary findings at the College of Physicians, laying the groundwork for his seminal work. Published in 1628 as 'Exercitatio Anatomica de Motu Cordis et Sanguinis in Animalibus' ('An Anatomical Study of the Motion of the Heart and of the Blood in Animals'), his treatise expounded on the circulatory system's mechanism, detailing how the heart propels blood in a circular course throughout the body.

While met with skepticism on the Continent, Harvey's theories garnered widespread acclaim in England, heralding a paradigm shift in the understanding of human physiology. Moreover, his groundbreaking insights extended beyond circulation, as he was the first to propose the concept of mammalian reproduction through the fertilization of eggs by sperm, a theory ahead of its time.

William Harvey's contributions transcended the boundaries of his era, revolutionizing the field of medicine and laying the foundation for modern cardiovascular science. His relentless pursuit of truth and unwavering commitment to scientific inquiry continue to inspire generations of medical practitioners and researchers, cementing his legacy as a visionary pioneer in the annals of medical history.
William Harvey and the Revolution of Blood Circulation

Biography of William Harvey (1578-1657)

William Harvey was an English doctor who closely observed the bodies of his patients and of animals. He realized that blood flowed round the body. He saw in the action of the heart in small animals and fish what was going on in people.

William Harvey was born in Folkestone, a small fishing village on the English Channel not far from Dover on the first day of April in 1578.

He was a student of medicine in 1600 and mastered the traditional theory of human physiology as well as all the scientific theory and medical practice that depended on it and supported it.

Harvey’s admission to the fellowship of the Royal College of Physician (1607), his appointment as Physician to St Bartholomew’s Hospital (1609), as Lumleian Lecturer in Anatomy (1615) and as Physician Extraordinary to the King are the great landmarks of the Jacobean period in Harvey’s life.

In 1628, Harvey published his revolutionary ‘circulation’ theory of the movement of the blood. He was the first doctor to actually describe the circulation in the body accurately.

Harvey’s discovery, which controverted the ancient theory of Galen, is one of the vital, incontestable breakthroughs in the history of science and medicine.
William Harvey (1578-1657)

William Harvey and Blood Circulation

William Harvey and Blood Circulation
William Harvey was born in Folkestone, Kent on 1 April 1578. His father was a merchant. Harvey was educated at King's College, Canterbury and then at Cambridge University. The continued his study of medicine at University of Padua.

On his return from Italy in 1602, Harvey established himself as a physician. His career was helped by his marriage to Elizabeth Browne, daughter of Elizabeth I's physician, in 1604. In 1607, he became a fellow of the Royal College of Physicians and, in 1609, was appointed physician to St Bartholomew's Hospital. In 1618, he became physician to Elizabeth's successor James I and to James' son Charles when he became king. Both James and Charles took a close interest in and encouraged Harvey's research.

Harvey's research was furthered through the dissection of animals. While acting as doctor to the court, Harvey carried out lots of research into human biology and physiology. He was very interested in the blood flow in the human body. Most doctors of the time accepted the teachings of Galen and felt that the lungs were responsible for moving the blood around the body but Harvey questioned these beliefs and investigated them scientifically.

Harvey carried out many experiments, both dissections and physiological experiments on animals. His observations of dissected hearts showed that the valves in the heart allowed blood to flow in only one direction. Direct observation of the heartbeat of living animals showed that the ventricles contracted together, dispelling Galen's theory that blood was forced from one ventricle to the other. Dissection of the septum of the heart showed that it contained no gaps or perforations. When Harvey removed the beating heart from a living animal, it continued to beat, thus acting as a pump, not a sucking organ. Harvey also used mathematical data to prove that the blood was not being consumed.

He first revealed his findings at the College of Physicians in 1616, and in 1628 he published his theories in a book entitled 'Exercitatio Anatomica de Motu Cordis et Sanguinis in Animalibus' ('An Anatomical Study of the Motion of the Heart and of the Blood in Animals'), where he explained how the heart propelled the blood in a circular course through the body. His discovery was received with great interest in England, although it was greeted with some skepticism on the Continent.

Harvey was also the first to suggest that humans and other mammals reproduced via the fertilization of an egg by sperm. It took a further two centuries before a mammalian egg was finally observed, but nonetheless Harvey's theory won credibility during his lifetime.
William Harvey and Blood Circulation