Most people are not aware that every human being is in fact an expert in fluid mechanics. We sustain our physical bodies by breathing air and drinking water. Every day we see changes in atmospheric weather patterns, feel the shifts in wind direction, and recognize the signs of impending precipitation. We all know from an early age that the water in streams and rivers flow downhill and notice the ocean waves generated by the wind.
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In fact, we are so accustomed to all of these things that we don’t consciously think of them as examples of fluid mechanics.
Essentially, without fluid mechanics our bodies could not function. Our hearts pump blood throughout our bodies, supplying our cells with oxygen and nutrients, and carrying away waste products.