What percentage of the body is composed of water?

The human body is made up of approximately 60% water, which serves as a critical component for various physiological functions. Water plays a vital role in maintaining body temperature, transporting nutrients, aiding in digestion, and facilitating cellular processes. While this percentage can vary slightly based on factors like age, sex, and body composition, the general estimate remains around 60%. This understanding is essential for combat medics, as recognizing the importance of hydration can significantly impact overall health and performance, especially in environments where fluid loss may be elevated.