Q:

How many gallons of blood are in the human body?

A:

Quick Answer

An average adult man weighing 160 pounds contains one and a quarter gallons of blood, or 10 pints. Estimation of blood volume is based on gender, age, weight, amount of lean body mass and even altitude: people who live at higher altitudes possess more blood to provide extra oxygen.

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Full Answer

People who weigh less generally carry less blood. Body fat percentage is a major factor in blood volume, as fat contains less blood than muscle; thus, if two people have the same weight, the person who has more fat would actually have a lower blood volume even if he appears to be larger. Gender affects body fat composition in ways that are not entirely known, although sex hormones play a role. Because women are generally shorter and have higher body fat percentages than men, they generally have lower blood volumes. An average woman who is 5 feet tall and weighs 100 pounds has a little less than a gallon of blood in her veins.

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Related Questions

  • Q:

    How much blood does the average adult human have?

    A:

    An average adult that weighs approximately 150 pounds will have about 186 ounces of total blood volume. Children that are about 80 pounds will have about 93 ounces, or half the amount of an adult.The amount of blood that the human body contains is about 7 percent of its weight.

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  • Q:

    How much blood does an average child have?

    A:

    According to LifeStream, an average child who weights 40 pounds has around 2 to 3 pints of blood. Scientists estimate, on average, that blood makes up about 7 percent of a person's total weight, regardless of age.

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  • Q:

    What does the blood carry?

    A:

    Blood is responsible for transporting oxygen, carbon dioxide, nutrients, hormones and proteins in the body, according to KidsHealth. The blood also carries glucose, ions, amino acids and waste products, such as urea, through the body. Red blood cells carry hemoglobin, a chemical that gives blood its red color.

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  • Q:

    Why is blood red?

    A:

    The red color of blood comes from the hemoglobin that makes up the majority of the mass of the cell, which allows the blood cell to carry oxygen around the body. The plasma itself is a straw color when viewed under a microscope, but the hemoglobin makes up so much of the blood cell that its red color overpowers the color of the plasma. When a red blood cell is full of oxygen, the red has a scarlet tint to it, when it has released it's oxygen its more of a dark burgundy color.

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