In the present paper, de Broglie matter wave has been generalized in terms of the ultimate acceleration on a cell-scale. A sperm fuses with an egg to begin the process of fertilization. In a fertilized egg, it is subject to the interference of the gravity-associated relativistic matter waves between egg and sperm in the cell, which would produce a beat phenomenon. The beating pulse as a gravity-clock will evolve into the embryo's heart beat, from then on for the whole life, no matter how many times the fertilized cell reproduces itself, the body is driven by the gravity-clock. The fertilized cell will develop 5 prominent proteins on its surface, finally the human body will evolve into 5 prominent branches: one head, two arms and two legs. The mean human lifespan is determined as 84 years; the total number of heart beats for a lifespan is determined as 3.08e+9 pulses, it holds for human being, mammals, birds and fishes. These predictions agree well with the experimental observations. Filter mechanism in kidney, liver and brain are investigated. It is found that the entanglement of the gravity-associated relativistic matter waves actually establishes a filter mechanism for the organs.