How much blood do we have in our bodies?
The average adult has about five to six quarts of blood, flowing through some 60,000 miles of blood vessels. The blood makes a complete journey round the body about once a minute, carrying water and oxygen to all the cells and collecting waste products from them, circulating hormones, and distributing antibodies to fight infection.
Does a big person have more blood than a small one?
Yes. We have about one pint of blood for every 12 pounds of body weight. And for every excess pound of weight we gain, the body has to build an extra mile of blood vessels— another sobering thought for the overweight!