The average adult human has approximately 6 quarts of blood, which is roughly equivalent to 5.7 liters. This amount can vary based on several factors including a person’s size, weight, and overall health. Blood makes up about 7% to 8% of a person’s total body weight, and its primary functions are to transport oxygen and nutrients, regulate body temperature, and remove waste products. Interestingly, the body has a remarkable ability to replenish blood volume in case of loss, which underscores the importance of blood in maintaining physiological homeostasis.
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