Which scientist discovered the circulation of the blood?

The correct answer is Dr. Richard Harvey, who is credited with the discovery of the circulation of blood in the human body. In the early 17th century, Harvey proposed that blood circulates throughout the body in a continuous loop, pumped by the heart. This groundbreaking work was published in his book "Exercitatio Anatomica de Motu Cordis et Sanguinis in Animalibus" in 1628. Harvey's discovery revolutionized the understanding of the cardiovascular system, laying the foundation for modern physiology and medicine by demonstrating that blood is not only formed but is continuously circulated to supply oxygen and nutrients to the body's tissues while removing waste products.

The other individuals listed do have significant contributions to medical science, but their roles do not pertain specifically to the discovery of blood circulation. Dr. Thomas Holmes, recognized as the “Father of Embalming,” made advancements in preserving bodies for burial, while John Hunter was a prominent surgeon known for his work in anatomy and surgery. August Hoffman was a chemist known for his research in organic chemistry but did not focus on anatomy or the circulatory system.