Really. An adult has 100,000 miles of blood vessels - enough to stretch around the equator four times.
Most of the blood vessels in the human body are microscopic capillaries. They're short but there are a lot of them - about 40 billion. So, even though they're small, they're so numerous they constitute the majority of the body's 100,000 miles of vessels.
To propel blood on this long journey the heart pumps about 4,000 beats an hour; 100,000 beats a day; 30 million times a year; and 2.5 billion times in a 70 year lifetime. In that period it would have pumped about 1 million barrels of blood - that's enough to fill more than 3 super tankers. Whew!
In view of all that hard work, "have a heart" and treat that life-giving pump well. It sure has done a heck of a job for you.