The heart, arteries and veins of the circulatory system were all well known t people from prehistoric times. Its true function was not known, however, until William Harvey (April 1, 1578 - June 3, 1657) showed that it recirculated the same blood throughout the body.
They are not "discovered" but built.
It was Discovered
zheng he discovered a lolipop land
j.l.abbott discovered the Aztecs 400 years ago
Gold was first discovered in mid Estens (6000 B.C.)
he discovered the circulatory system back in 1628
WILLIAM harvey
Harvey discovered the blood circulatory system.
He discovered the circulation system of the body
closed circulatory system (double circulatory system)
They're both the circulatory system.
Amphibians have closed circulatory system Closed
William Harvey, an English physician, is credited with the discovery of the blood circulatory system in the early 17th century. Harvey's work demonstrated that blood circulated throughout the body in a closed system, propelled by the heart. His findings revolutionized the understanding of human physiology.
The circulatory system
open circulatory systemclosed circulatory system.
The cadiovascular system, sometimes called the circulatory system when it includes the lymphatic system.
Well,circulatory system is made up of BLOOD and heart.