Abstract
Some biological phenomena which involve biological surfactants are treated It is shown how their properties of surface tension reduction and formation of association structures is widely applied in different biological systems It is very well known, that biochemical mechanisms occur in compartments with highly selective and individualized structure that function at any level. All these structural units are separated from the rest by interfaces. For instance, our skin can be considered as the interface that separates us from the surrounding air; each organ is differentiated from the rest of the living organism by a system of membranes with the ultimate cellular membrane.