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15.50 gallons is about ten times as big as The Blood in a Human Body
In other words, the size of The Blood in a Human Body is 0.10 times that amount.
(for 70 kg body; average altitude; average)
The volume of blood in the average human body is about 1 gallons. Persons living at high altitude, however, may have up to an additional 0.50 gallons of blood to compensate for the lower oxygen level.
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