what percent of the human body is made of water?
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Water is of major importance to all living things; in some organisms, up to 90% of their body weight comes from water. 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.
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Water Facts - Worldwide Water Supply Water covers about 71% of the earth's surface. 97% of the earth's water is found in the oceans (too salty for drinking, growing crops, and most industrial uses except cooling). 3% of the earth's water is fresh.
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Almost 50% of the mass of the human body is made up of six elements: oxygen, carbon, hydrogen, nitrogen, calcium, and phosphorus. Only about 0.85% is composed of another five elements: potassium, sulfur, sodium, chlorine, and magnesium.
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Water covers about 71% of the earth's surface. 97% of the earth's water is found in the oceans (too salty for drinking, growing crops, and most industrial uses except cooling). 3% of the earth's water is fresh.
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To break the numbers down, 96.5% of all the Earth's water is contained within the oceans as salt water, while the remaining 3.5% is freshwater lakes and frozen water locked up in glaciers and the polar ice caps. Of that fresh water, almost all of it takes the form of ice: 69% of it, to be exact.
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The human body contains many salts, of which sodium chloride (AKA common table salt) is the major one, making up around 0.4 per cent of the body's weight at a concentration pretty well equivalent to that in seawater.
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percentage of water 50 to 70 percent of body weight, approximately 60 percent in healthy adults and an even higher percentage in children.
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Scientists believe that about 25 of the known elements are essential to life. Just four of these – carbon (C), oxygen (O), hydrogen (H) and nitrogen (N) – make up about 96% of the human body. 25 elements are known to be essential to life.
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Answer and Explanation: In general, 60-70% of our body is made out of liquids. If we exclude gasses within our lung and digestive system from the equation then it can be safely assumed that approximately 30-40% of our body is solid.
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50 to 70 percent of body weight, approximately 60 percent in healthy adults and an even higher percentage in children. Because lean tissue is about three-quarters water, and fatty tissue is only about one-fifth water, body composition—the amount of fat in particular—determines the percentage of body water.
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There are generally two versions of the answer to this question. The first is the more general about 70% of Earth is water while about 30% is land (US Geological Society). The second is the more specific 71% of Earth is water while 29% is land.
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Most biomolecules are organic compounds, and just four elements—oxygen, carbon, hydrogen, and nitrogen—make up 96% of the human body's mass.
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75% of the human body is made up of water. The main functions of water in living systems are as an effective biological solvent, a reactant molecule in many biological reactions, a temperature regulator, and a pH buffering agent.
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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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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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Answer and Explanation: The percent composition of water is 11.19 percent hydrogen and 88.81 percent oxygen.
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About 91-96% of urine consists of water. Urine also contains an assortment of inorganic salts and organic compounds, including proteins, hormones, and a wide range of metabolites, varying by what is introduced into the body.