William Harvey (circulatory system)

William Harvey was a 17th-century English physician known for discovering how blood circulates through the body. He demonstrated that the heart acts as a pump, pushing blood through arteries to the organs and back via veins, forming a continuous loop. Harvey’s work overturned the earlier belief that blood was created and consumed by organs. His insights laid the foundation for modern cardiovascular understanding, showing that the circulatory system is a closed circuit essential for delivering oxygen and nutrients, and removing waste. This breakthrough advanced medical science and improved our understanding of human physiology.