Blood Vessels are too long to encircle the Earth 

The human circulatory system is a marvel of complexity, with blood vessels traversing every nook and cranny of the body. 

If you were to lay out all the blood vessels in an average adult end to end, they would stretch over 1 Lakh kilometer, enough to encircle the Earth more than twice! Periphery of the earth is 40,075 km at equator. 

Such a vast expanse of blood vessels highlights the remarkable efficiency of our circulatory system in sustaining life.