Complex systems biology (CSB) is a field of science that studies the emergence of complexity in functional organisms from the viewpoint of dynamic systems theory.  The latter is also often called systems biology and aims to understand the most fundamental aspects of life. A closely related approach to CSB and systems biology called relational biology is concerned mainly with understanding life processes in terms of the most important relations, and categories of such relations among the essential functional components of organisms; for multicellular organisms, this has been defined as "categorical biology", or a model representation of organisms as a category theory of biological relations, as well as an algebraic topology of the functional organization of living organisms in terms of their dynamic, complex networks of metabolic, genetic, and epigenetic processes and signaling pathways .   Alternative but closely related approaches focus on the interdependance of constraints, where constraints can be either molecular, such as enzymes, or macroscopic, such as the geometry of a bone or of the vascular system. 
She came to know the drudgery of housework, the odious labors of the kitchen. She washed the dishes, staining her rosy nails on greasy pots and the bottoms of pans. She washed the dirty linen, the shirts and the dishcloths, which she hung to dry on a line; she carried the garbage down to the street every morning, and carried up the water, stopping at each landing to catch her breath. And, dressed like a commoner, she went to the fruiterer's, the grocer's, the butcher's, her basket on her arm, bargaining, insulted, fighting over every miserable sou .