What Are You Made Of?

I am curious about what percentage of the human body is water. I think there was a convoluted conversation with a toddler that reminded me that I do not know this very basic fact.

I remember Nagilum (scaaaaary!) calling the Enterprise D crew "ugly bags of mostly water" and Data reported that he was being accurate. So it's at least 50% I think. Once I asked an actual medical doctor with a degree and everything and she said somewhere around 65-70 percent but admitted that she was basing her answer on a memory of a Calvin and Hobbes cartoon, not her presumably extensive training in biology.

But I already asked y'all about the Bible thing this month, so I'm going to do my own research this time. Ready? Here I go. (Note: This will seem instantaneous to you, but will involve long minutes of painstaking research for me. You're welcome.) The answer is:

The human body...is made up of between 55 and 75 percent water (lean people have more water in their bodies because muscle holds more water than fat). Water...makes up, on average, 60 percent of your body weight. source

The human body is 61.8 percent water by weight. Protein accounts for 16.6 percent; fat, 14.9 percent; and nitrogen, 3.3 percent of human body weight. Other elements constitute smaller percentages of body weight. source

Hey, this is one of my internet questions that wikipedia actually totally knocks out of the park. (Not always the case - remember Adventures of Ivan and Rob vanVliet, readers?)

Incidentally, Data is made up of 24.6 kilograms of tripolymer composites, 11.8 kilograms of molybdenum-cobalt alloys and 1.3 kilograms of bioplast sheeting. source

Anyway, there. I did it myself.