What percentage of the human body is composed of water?

The human body is composed of about 65% water, which plays a crucial role in various physiological processes. This percentage can vary slightly based on factors such as age, gender, and body composition. For instance, infants have a higher water percentage, roughly around 75-78%, while the water content in elderly individuals tends to be lower, closer to 50-60%.

Water serves as a solvent for biochemical reactions, regulates body temperature, and is vital for transporting nutrients and waste. Understanding the specific percentage of water in the human body highlights its importance in maintaining homeostasis and supports many bodily functions.