Vitamin B is required in your body for a number of reasons. Like phosphorus, some forms of vitamin B regulate your energy, while others improve your mental capacity and your emotional stability. Phosphorus is necessary for your body to take in vitamin B and use the many forms of it properly within the body.
Structural functionalism, or simply functionalism, is a framework for building theory that sees society as a complex system whose parts work together to promote solidarity and stability.
Functionalism says that mental states are constituted by their causal relations to one another and to sensory inputs and behavioral outputs. Functionalism is one of the major theoretical developments of Twentieth Century analytic philosophy, and provides the conceptual underpinnings of much work in cognitive science.