Approximately what percentage of an average adult person's body is water?
536169
In males about 60% of the body mass is water. This value is about 55% in women due to a higher proportion of body fat. This is the total body water.\n\nOf this water, two-thirds of it is in the cells, and is called intracellular water. The other third is extracellular water.\n\nThe extracellular water is made up of blood plasma, which is one-fifth of extracellular water, and extracellular fluid constitutes the other four-fifths.
504972
You really should see a doctor but Kidney-Well II has some rave reviews. Don't try drinking 14 litres of water a day. Drinking water at every opportunity can cause serious problems, such as hyponatraemia or water intoxication. As the water content of the blood increases, the salt content is diluted. Consequently the amount of salt available to body tissues decreases, which can lead to problems with brain, heart and muscle function.  An average adult should consume 2½ litres of water per day. This intake needs to be increased during periods of hot weather or during and after periods of physical activity.
702485
Though 78% of the earth are water bodies, as per a study 88% of the water available in the world is from seas and oceans and not potable. Desalination in some areas are done at a very high cost which is only 0.007%, so it is very negligible. Of the balance 12% or less 50 percent of all potable water is wasted or lost in the developing world; Pollution, with some 2 million tons of human excrement and an ever-increasing volume of untreated discharge from industry going into urban water supplies every day. The ground water table is also depleting very fast and getting contaminated or many areas have become dry. This accounts for +3%. The balance of 3 % are so is available now.\n\nIn the developing world, more than 1 billion people cannot get clean drinking water, and 1.7 billion people lack access to adequate sanitation facilities. The United Nations says that dirty water causes 80 percent of diseases in the developing world, and kills 10 million people annually.\n\nWATER CRISIS IS LIKELY TO STRIKE MOST DEVELOPING WORLD CITIES BY 2010. \n\nThus the position is very alarming and water conservation and Storm water harvesting are being implemented by many countries to save the situation.
751490
Without doing a rigorous calculation I will guesstimate that it will be Oxygen.\n\nIf body is 70% water, Oxygen in water is ~90% so oxygen will be ~63% in body.
358776
Water is one of your most urgent needs in a survival situation. You can' t live long without it, especially in hot areas where you lose water rapidly through perspiration. Even in cold areas, you need a minimum of 2 liters of water each day to maintain efficiency. \n\nMore than three-fourths of your body is composed of fluids. Your body loses fluid as a result of heat, cold, stress, and exertion. To function effectively, you must replace the fluid your body loses. So, one of your first goals is to obtain an adequate supply of water.
443013
It depends on how far out of the water you wish to be.  Humans are very close to being bouyant-we are more dense than water, but have lungs full of air, thus a lean man with a large lung capacity is bouyant with a deep breath.  Its isnt the pounds of air that matter, its the pounds of water displaced by the air.  If you hold onto a 10 gallon jug full of air, it displaces 10 gallons worth of water, which is about 80 pds-well more than you need to keep your upper body above water.  For a 200 pd man, he would need an water-displacing container of 25 gallons (this could be a boat or anything else that displaces water for air).
1056467
Drinking a gallon of water a day is fine as long as you're not drinking it all in one sitting.  As a general guideline, most adults need about three quarts of fluid each day. Much of that water comes from food, so 8-12 eight ounce glasses a day is a common recommended intake. You may need more water if the weather is very warm or very dry, if you are exercising, or if you are taking certain medications. \n\nAs far as the gut thing goes...give me a break!
746922
Most of the human body is made up of water, H2O, with cells consisting of 65-90% water by weight. Therefore, it isn't surprising that most of a human body's mass is oxygen. Carbon, the basic unit for organic molecules, comes in second. 99% of the mass of the human body is made up of just six elements: oxygen, carbon, hydrogen, nitrogen, calcium, and phosphorus.\n\nOxygen (65%) \nCarbon (18%) \nHydrogen (10%) \nNitrogen (3%) \nCalcium (1.5%) \nPhosphorus (1.0%) \nPotassium (0.35%) \nSulfur (0.25%) \nSodium (0.15%) \nMagnesium (0.05%) \nCopper, Zinc, Selenium, Molybdenum, Fluorine, Chlorine, Iodine, Manganese, Cobalt, Iron (0.70%) \nLithium, Strontium, Aluminum, Silicon, Lead, Vanadium, Arsenic, Bromine (trace amounts)
499532
According to medicine 75 percent of the body constitutes fluid or in particular water. So an average Man who weighs 200 lbs would be weighing around 50 lbs if all the fluid in his body is taken away. I cannot be more precise than that. Hope you are satisfied.
724471
water, water and water........Drink atleast 8-12 glasses of water/day
1236
Take a deep breath.  The average density of a human is 61-67lbs/ cubic foot, but this drops to 56-62 lbs/cu foot if you inhale.
502512
Honestly, it depends on your weight & activity level.\n\nIf you are not very active, meaning you mostly sit alot of the time, either watching TV, being on the internet & the only exercise you get is in gym class & walking to the bus stop (sedintary), then you only need about 50oz. if you weigh about 100lbs. But if you're fairly active, like involved in a sport in/out or after school & do a lot of things around the house, yard work, etc, then add a 1/4 more (25oz more) on to that, for someone weighing about 100lbs.\n\nHere's how you find out how much water you should drink- take your body weight & devide it in half. For example, if you weigh only 80lbs & are pretty much a couch potato, then you need to drink AT LEAST 40oz of water a day. However, it is strongly recomended that kids (over 65lbs) drink at least 50oz a day. The more active you are, the more water you need, because you have to replace what you lost through working out & from what you muscles obsorbed while working out.\n\nThe 8 8oz. glasses a day rule, or 64oz a day, really only applies to sedintary adults weighing an average of 150.
337195
Food usually accounts for 20 percent of your fluid intake, so you if you consume 2 liters of water or other beverages a day (a little more than 8 cups), along with your normal diet, you can replace the lost fluids. \nEight 8-ounce glasses of water a day. Another approach to water intake is the "8 x 8 rule" — drink eight 8-ounce glasses of water a day (about 1.9 liters). The rule could also be stated, "drink eight 8-ounce glasses of fluid a day," as all fluids count toward the daily total. Though this approach isn't supported by scientific evidence, many people use this basic rule as a guideline for how much water and other fluids to drink. \nDietary recommendations. The Institute of Medicine recommends that men consume 3 liters (about 13 cups) of total beverages a day and women consume 2.2 liters (about 9 cups) of total beverages a day. These guidelines are based on national food surveys that assessed people's average fluid intakes. \nYou can choose any of these fluid intake approaches to gauge your fluid needs. But your current total fluid intake is probably OK if you drink enough water to quench your thirst, produce a colorless or slightly yellow normal amount of urine, and feel well.
301132
Pure water is 7, but it depends on the source of the drinking water. It can vary by a few points in either direction.
449917
Water Systems:\n\nhttp://www.ec.gc.ca/water/images/nature/prop/a2f2e.jpg\n\n95% of Earth's water is Salt Water leaving 5% as Fresh Water.  Nearly all of the Fresh water is in the form of Ice or underground.\n\nThis site appears to have a lot of data as well as activities for learning.\n\nhttp://members.aol.com/bowermanb/water.html
1087611
More than 70% .        Of the whole earth's surface 80% is water. \nIt's too bad, 97.2% of all the water on earth is salt water though. \nNow, where do you think most salt water is found? That only leaves 2.8% is fresh water that we can drink or play in.
417467
WELL, there are 1,400,000,000 cubic kilometers of water total on the earth in all forms (ice, ground, surface, air, and soil), of which only about 3 percent is fresh water (two-thirds of which is frozen in glaciers and polar ice caps), which is 42,000,000 km3 total, or 13,860,000 km3 of liquid fresh water on earth.\n\nhey, i wonder how much of that is inside people.... :)