Heart, liver, or kidney disease. Sometimes swelling can indicate a problem such as heart, liver, or kidney disease. Ankles that swell in the evening could be a sign of retaining salt and water because of right-sided heart failure. Kidney disease can also cause foot and ankle swelling.
The average human body is estimated to be about 60 to 70 percent water. The percentage may be as high as 75% in infants, decreasing to 57-60% in adults. This does not include water that is part of hydrated chemical compounds in the body, which can only be removed chemically or by heat drying.
What percentage of water is in most living cells? What percentage of the volume of a living cell is water? The exact percentage of water per living cell is dependent on  tissue type. However, it is estimated and accepted that water  accounts for 70% by mass of each cell. 2 people found this useful. Edit.