how many percent of water does human have?
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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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For a detailed explanation of where Earth's water is, look at the data table below. Notice how of the world's total water supply of about 332.5 million mi3 of water, over 96 percent is saline. Of total freshwater, over 68 percent is locked up in ice and glaciers.
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The average person uses 101.5 gallons of water Per day.
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This is the activity that uses the most water worldwide By some estimates, a whopping 70 percent of all freshwater globally is used for agriculture. Since only 2.5 percent of the earth's water is freshwater, agriculture isn't just a burden on the water supply – it's a massive piece of a shockingly small pie.
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3% of the earth's water is fresh. 2.5% of the earth's fresh water is unavailable: locked up in glaciers, polar ice caps, atmosphere, and soil; highly polluted; or lies too far under the earth's surface to be extracted at an affordable cost. 0.5% of the earth's water is available fresh water.
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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 3 percent of Earth's water is fresh water. Of the 3 percent, about 69 percent is ice.
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“In general, having between 2.2 litres of water for women and 2.8 litres for men would be sufficient,” said Aswegen. Water makes up on average 60 per cent of body weight in men and 50-55 per cent in women since they have a higher percentage of body fat.
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Ice caps and global water distribution As these charts and the data table show, the amount of water locked up in ice and snow is only about 1.7 percent of all water on Earth, but the majority of total freshwater on Earth, about 68.7 percent, is held in ice caps and glaciers.
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The average adult loses two to three liters of water a day through natural bodily functions, which is why it's so important to replace that missing water by ingesting two to three liters of fluid a day.
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By one year of age, that amount drops to about 65%. In adult men, about 60% of their bodies are water. However, fat tissue does not have as much water as lean tissue. In adult women, fat makes up more of the body than men, so they have about 55% of their bodies made of water.
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But, most of Earth's water, and almost all of the water that people can access, is saline, or salty water. Just look at the oceans and remember that oceans comprise about 97% of all water on, in, and above the Earth.
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= 40% V Write the fraction as a percent. 7. STEM About 0.7 of the human body is water. What percent is equivalent to 0.7? (Example 6) 70% Rate Yourself!
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2.5 gallons The average person uses 101.5 gallons of water Per day.
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According to current estimates, each person consumes approximately 150 litres per day — equating to almost two full bathtubs of water per person per day, or 54,750 litres per person each year. Most of this water is flushed away every day.
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Only about three percent of Earth's water is freshwater. Of that, only about 1.2 percent can be used as drinking water; the rest is locked up in glaciers, ice caps, and permafrost, or buried deep in the ground.
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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.