The immediate surroundings of a cell, influencing its behavior, like growth factors, other diffusing biosignals, gradients, ECM composition, surrounding cells, mechanical stresses, bioelectric fields, etc. Biosignaling fields Field representation a CellµEnv's subset (e.g. scalar, vector, matrix or tensor in one or more dimensions). Homeostasis Tendency of a system toward a state of equilibrium, notably during the physiological or pathological maintenance of an organ.