The blood vessels are the part of the circulatory system that transports blood throughout the human body. There are three major types of blood vessels: arteries, veins, and capillaries. Though blood vessels are relatively small, the network is amazingly long. In fact, if they were laid out in a line, they would measure more than 60,000 miles in length. Considering that the circumference of the Earth is 24,873 miles, according to NASA, that means your blood vessels could circle the globe more than twice.
