Question

An organ that maintains the circulation of blood?

Answer 1

the organ that u are asking about is heart which maintains the circulation of blood

Answer 2

Heart is muscular organ present in thoracic cavity maintains the circulation of blood throughout the body.

Heart is surrounded by membrane called the pericardium. Potential space between pericardium and heart contains watery pericardial fluid.

Watery pericardial fluids prevent friction between heart and pericardium. Flow of blood in heart is controlled by opening as well as closing of valves.