I believe there a some https://en.wikipedia.org/wiki/Lotka%E2%80%93Volterra_equations implemented (edit:) BETWEEN most body systems for survivability of the individual organism.

Edit: I believe there are natural stages in the development of a human organism: So once certain lines are crossed, certain tissue is "disabled" to grow more in a body.

Certainly these tissues do develop anyway in later stages, but the immune system fights it, so the whole organism doesn't get problems or in a way somewhat like that it works, i believe.