% of $H_2O$ in human body is:

Question

Accepted Answer

The correct option is (1):

The human body is composed of a significant percentage of water, which is crucial for numerous physiological functions. Water acts as a vital nutrient, a building material for cells, and plays a key role in regulating internal body temperature through processes like sweating and respiration. While the exact percentage can vary slightly based on age, gender, and body composition, a commonly accepted average for adults is around 55-60%. For instance, in adult men, about 60% of their bodies are water, while in adult women, this figure is closer to 55% due to a higher percentage of fat tissue, which contains less water than lean tissue. At one year of age, the water content is approximately 65%. Therefore, among the given options, 65% represents a reasonable and frequently cited percentage for the water content in the human body, especially when considering a general average or specific age groups.

The incorrect option is (2):
75% is a higher percentage than the typical average for adult humans. While infants can have a water content of around 75%, this is not representative of the general human population, especially adults.

The incorrect option is (3):
85% is an unusually high percentage of water for the human body. Such high percentages are typically not observed in healthy humans at any age.

The incorrect option is (4):
95% is an extremely high and inaccurate percentage for the water content in the human body. This level of water content is not found in humans.