In which group is the percentage of body weight attributed to water the highest?

The percentage of body weight attributed to water is highest in infants. Infants have a significantly higher water content compared to other age groups, with about 75-78% of their body weight comprised of water. This high percentage is crucial for their growth and development, as water plays a vital role in all physiological processes, including temperature regulation, transport of nutrients, and waste removal.

As individuals grow older, their body composition changes; the percentage of water in the body generally decreases. In adults, this percentage typically ranges from 50-65%, and for older adults, it can be even lower due to decreased muscle mass and increased fat content. Teenagers have a higher water percentage than adults, but still less than infants. Children also have a higher water percentage than adults, but not as high as infants. Therefore, infants are the group with the highest percentage of body weight attributed to water.