Huge Variety of Usual and Unusual LaptopsIf you stretched out all the blood vessels and capillaries in your body, they would wrap around the equator two times. The smallest of your capillaries are one-fiftieth the diameter of one of your hairs. If you weigh twenty-five pounds (11 kg) more than average, your heart has to work to circulate blood an extra 5,000 miles (8,000 km).
