Answer :
Final answer:
First, the weight of the adult is converted from pounds to kilograms, resulting in approximately 55.45 kg. Using the formula of 70mL of blood per kg of weight, the blood volume is calculated to be approximately 3881.55 mL or 3.88 liters, which aligns with typical blood volumes for adults.
Explanation:
To calculate the blood volume of an adult who weighs 122 lbs, the first step is to convert the weight to kilograms (kg) since the formula provided uses kg. To do this, we will divide 122 lbs by 2.2 (since 1 kg is approximately equal to 2.2 lbs). This gives us approximately 55.45 kg.
Next, we will use the formula for blood volume: 70mL of blood per kg of weight. We will multiply 55.45 kg by 70 mL/kg, which gives us a total blood volume of approximately 3881.55 mL. We can convert this to liters by dividing by 1000, meaning this individual has approximately 3.88 liters of blood.
For reference, it’s helpful to know that blood constitutes about 8 percent of adult body weight, and adult males typically average about 5 to 6 liters of blood while females average 4-5 liters. Knowing this, our result of 3.88 liters of blood for an adult with a weight of 122 lbs seems reasonable.
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