What percentage of a cell is composed of water?

In terms of cellular composition, water is a major component, contributing significantly to the overall mass and volume of a cell. Most estimates suggest that the water content in an average cell is around 70% to 80%. This water is crucial as it serves various essential functions, including acting as a medium for biochemical reactions, providing structural support, and regulating temperature. While the most commonly accepted figure for the water content in cells is about 70%, some specialized cells, like muscle cells, can have up to 80% water content. Notably, certain environments or specific cell types may vary, leading to higher estimates, but 80% is a commonly cited figure when discussing overall cellular hydration in a broader context.