Explain why water is important for living organisms. Include reference to its properties as a solvent and its role in chemical reactions.

Water is a universal solvent, allowing many substances to dissolve and be transported within the organism.
Water dissolves essential ions and molecules, enabling their movement in blood, sap and other fluids.
It acts as a reactant in hydrolysis reactions, such as the breakdown of food during digestion.
Water is also a reactant in photosynthesis, where it is split to provide electrons and protons.
Its high specific heat capacity means large amounts of energy are required to change its temperature, stabilising body temperature and aiding thermal regulation.