What percentage of the human body is made up of water?

The correct answer is that approximately 60% of the human body is made up of water, not 90%. While the percentage of water in the body can vary depending on factors such as age, gender, and body composition, the commonly accepted average indicates that around 50%-70% of an adult's body weight is attributed to water.

In infants, the percentage can be higher, around 75-78%, which may lead to some misunderstanding about the averages across different age groups. This emphasis on the importance of water emphasizes its critical role in numerous bodily functions, including regulating temperature, transporting nutrients, and aiding digestion.

The other percentages listed are significantly above the average for adults, particularly the 90% figure, which is more representative of the water content in certain biological fluids or in individual cells rather than the human body as a whole. Therefore, when considering the human body's total water content, lower percentages closer to that 60% average are more accurate.