Final answer:
The water content of lean tissue is approximately 75%. This percentage reflects the high water composition in human physiology, especially in organs like the brain and kidneys.
Step-by-step explanation:
You asked, "What percentage of lean tissue represents the water content?" The answer to your question is that approximately 75% of lean tissue is composed of water. The composition of the human body varies significantly, where water content can range from about 50%-70% of an adult's body weight, heavily influenced by body fat content. Infants have even higher water content, approximately 75% of their body mass. Different tissues and organs have varying water contents; for instance, the brain and kidneys are very high in water content, reaching 80-85% of their mass. In contrast, teeth have the lowest proportion of water, at 8-10 percent. Identifying the water content in lean tissue is crucial in understanding human physiology and the importance of hydration for maintaining healthy bodily functions.