The body is a masterpiece of exquisite design. Beautifully "engineered," it is governed by several hundred systems of control -- each interacting with and affecting the other. His brain has 10 billion nerve cells to record what he sees and hears. His skin has more than 2 million tiny sweat glands -- about 3000 per square inch -- all part of the intricate system, which keeps his body at an even temperature. A "pump" in his chest makes his blood travel 168 million miles a day -- equivalent of 6720 times around the world! The lining of his stomach contains 35 million glands secreting juices, which aid the process of digestion. And these are but a few of the involved processes and chemical wonders, which operate to sustain his life.