Bioflash: "The Life of Blood"

Arteries and veins—our fluid freeways—provide a direct line from the lungs to every living cell. One red blood cell shuttles a billion oxygen in its donut-shaped disc, stacking capillaries with the breath of life. No DNA guides this cell. Born in the bone marrow, he is slave to a merciless heart. One hundred days later, broken and beaten, the red blood cell disassembles. A new car is made from his old parts, this vital transport racing along dilated vessels. And so blood flows with every beat, carrying life from lung to tissue, artery to vein, heart to cell.

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