OUR ALL-IMPORTANT CIRCULATION – CONCLUSION
Thus far we have spoken of only one function of the circulatory system, the supply. But, as in every manufacturing plant, we must also concern ourselves with the waste products the body produces. They must be promptly eliminated if congestions, in other words breakdowns, are to be avoided. The train on its way back to Basel may be compared to our venous system, which is responsible for returning all the waste products resulting from burning-up processes, for example carbon dioxide and uric acid. Some of these waste products are recycled by the liver or eliminated with the help of the kidneys. If this process of transportation becomes obstructed, problems will be inevitable, since the accumulation of waste causes tension and pressure. The train may be derailed and the mail scattered, lying undelivered on the rails. In terms of our body this means the formation of varicose veins.
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