osmotrophy

Osmotrophy is a mode of nutrition where an organism takes in dissolved nutrients directly from its environment, often through processes like pinocytosis. This is distinct from phagotrophy, which involves engulfing solid food particles. Osmotrophy is a characteristic of some protists, which are single-celled eukaryotic organisms. These organisms must carry out all life-sustaining functions within their single cell, unlike multicellular organisms that have specialized organ systems. Osmotic pressure, the force preventing solvent movement across a semipermeable membrane, is relevant to how cells manage dissolved materials and water balance, a process known as osmoregulation.1234