In one year the average human heart circulates from 770,000 to 1.6 million gallons of blood through the body, enough fluid to fill 200 tank cars, each with a capacity of 8,000 gallons. That's 4000 gallons of blood each day. The heart creates enough pressure to squirt blood 30 feet (9 m). Blood travels 60,000 miles (96,540 km) per day on its journey through the body.

If all the blood vessels in a single human body were stretched end to end, they would form a rope capable of going around the world or 60,000 miles of blood vessels.

The average adult has around 10 pints (1.25 gal) of blood in their body. The Ketchua Indians of the Andes Mountains in South America have 2 to 3 more quarts of blood in their bodies than people who live at lower elevations.