This contractile very sensitive membrane is the basis for life. The most important thing for biological organisms is the movement after emotion. This already knew Goethe and Galvani in the 18th century. In the contraction phase every muscle needs no energy in the orthodox biological sense of this word. The energy comes from the transformation of the dense water of the latter one into the gaseous shape of water which formula everyone can found in the official textbooks. The density of this water is similar of helium. This membrane transpirates in both directions vertical from the membrane. It sacrifices its life (dense water of life) and is shrinking with power. Life is power through sacrifice. Read the following article and my book about the surface of water and the reflection of the world in this one.