The human body is designed for precise, efficient functioning. In our human realm, creative inventors and engineers design and develop simple and complex machines that perform work more efficiently. A review of examples of pulley systems, wheels and axles, friction-reducing sacs within joints and compression/tension abilities of bones in the human body is presented. The functional superiority of the human brain over lower animals is cited. Since designs infer a designer, an unbiased observer would have great difficulty denying the rationality of inferring that these highly designed mechanisms in the human body had to be designed by an outside, suprahuman intelligent agent (Logos), the Creator.