Which physician is known for describing the circulation of blood?

Which physician is known for describing the circulation of blood?

• A. Andreas Vesalius
• B. William Harvey
• C. Edward Jenner
• D. Robert Hooke

Answer: (B)

Understanding how blood moves through the body hinges on recognizing the heart as a muscular pump that drives a closed loop of circulation. Before this idea, many believed blood was produced in the liver and consumed as fuel, with no continuous circulation. The physician who clarified circulation showed that the heart pushes a constant volume of blood through arteries to the tissues and back through veins, forming a loop. He argued the same blood must return to the heart, meaning the amount pumped per beat matches the amount that circulates, and he noted valves in veins to prevent backflow, which supports a one-way circuit. This work, culminating in De Motu Cordis in 1628, established the concept of systemic and pulmonary circulation and laid the groundwork for modern physiology. While Vesalius advanced anatomical understanding, Jenner developed vaccination, and Hooke made contributions to microscopy and experimentation, none described how blood circulates in the body.

Understanding how blood moves through the body hinges on recognizing the heart as a muscular pump that drives a closed loop of circulation. Before this idea, many believed blood was produced in the liver and consumed as fuel, with no continuous circulation. The physician who clarified circulation showed that the heart pushes a constant volume of blood through arteries to the tissues and back through veins, forming a loop. He argued the same blood must return to the heart, meaning the amount pumped per beat matches the amount that circulates, and he noted valves in veins to prevent backflow, which supports a one-way circuit. This work, culminating in De Motu Cordis in 1628, established the concept of systemic and pulmonary circulation and laid the groundwork for modern physiology. While Vesalius advanced anatomical understanding, Jenner developed vaccination, and Hooke made contributions to microscopy and experimentation, none described how blood circulates in the body.