how much percent water are humans?
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Up to 60% of the human adult body is water. According to H.H. Mitchell, Journal of Biological Chemistry 158, the brain and heart are composed of 73% water, and the lungs are about 83% water. The skin contains 64% water, muscles and kidneys are 79%, and even the bones are watery: 31%.
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When it comes to what we eat, many don't consider the role that water plays in producing our food. To produce enough food to sustain the planet's population, 52.8 million gallons of water per second are required. Of our total water consumption, food accounts for approximately 66 percent.
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Rivers make up 0.49% of surface freshwater. Although rivers account for only a small amount of freshwater, this is where humans get a large portion of their water.
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Oxygen (65%) and hydrogen (10%) are predominantly found in water, which makes up about 60 percent of the body by weight. It's practically impossible to imagine life without water. Carbon (18%) is synonymous with life.
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But just how much water exists on, in, and above our planet? About 71 percent of the Earth's surface is water-covered, and the oceans hold about 96.5 percent of all Earth's water.
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The Institute of Medicine recommends between 2.7 liters (11 cups) and 3.7 liters (16 cups) of total water to meet the hydration needs of most healthy adults. Total water refers to water from both foods and beverages. A cup is equivalent to 8 ounces of water.
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According to USGS estimates, each person in the United States uses about 80-100 gallons of fresh water per day. On a monthly basis nationwide, Americans use 3.9 trillion gallons of water.
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Adding a hot liquid to your body does increase your body temperature, but the warming effect on your body is minimal. Humans are 70 percent water. A 170-pound person contains about 15 gallons of water. Imagine adding eight ounces of warm water to 15 gallons of warm water—the temperature won't really change that much.
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The ideal body water percentage varies. In general, women have a lower body water percentage than men. This is because women have more tissue than men. The ideal percentage for adult women will fluctuate between 45 and 60%, while the ideal percentage for adult men will be between 50 and 65% of the total body.
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Only 3% of the Earth's water is freshwater. Of that 3% majority of it is ice.
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While nearly 70 percent of the world is covered by water, only 2.5 percent of it is fresh. The rest is saline and ocean-based. Even then, just 1 percent of our freshwater is easily accessible, with much of it trapped in glaciers and snowfields.
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About 97 percent of Earth's water is in the ocean. The ocean covers more than 70 percent of the surface of our planet. It's hard to imagine, but about 97 percent of the Earth's water can be found in our ocean. Of the tiny percentage that's not in the ocean, about two percent is frozen up in glaciers and ice caps.
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Water quantity You should have at least four litres of water per person per day - for drinking, food preparation, personal hygiene and dishwashing.
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By weight, the average human adult male is approximately 60-63% water, and the average adult female is approximately 52-55% water. There can be considerable variation in body water percentage based on a number of factors like age, health, water intake, weight, and sex.
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About 10 % to 20 % of water is lost through the respiratory system.
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In reality, however, we have a limited amount of usable fresh water. Over 97 percent of the earth's water is found in the oceans as salt water.
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The average American family uses more than 300 gallons of water per day at home. Roughly 70 percent of this use occurs indoors. Each American uses an average of 88 gallons [333 litres] of water a day at home.