There are approximately 100,000 miles of blood vessels in the human body.
Seven percent of a humans body weight is made up of blood.
In the early nineteenth century some advertisements claimed that riding the carousel was good for the circulation of blood.
Each day 400 gallons of recycled blood are pumped through the kidneys.
By donating just one pint of blood, four lives can be saved.
Blood is such a good stain that Native Americans used it for paint.
The kidneys filter over 400 gallons of blood each day.
The average life span of a single red blood cell is 120 days.
Blood accounts for about 8% of a human's body weight.
A woman has approximately 4.5 liters of blood in her body, while men have 5.6 liters.
Your blood takes a very long trip through your body. If you could stretch out all of a human's blood vessels, they would be about 60,000 miles long. That's enough to go around the world twice.
Half your body’s red blood cells are replaced every seven days.
If all the blood vessels in your body were laid end to end, they would reach about 60,000 miles.
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