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Element: Oxygen
Symbol: O Atomic Number: 8 Approximate Percent by Human Body by Weight: 65.0 |
Importance: Required for cellular metabolism; component of water; present in most organic compounds
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Element: Carbon
Symbol: C Atomic Number: 6 Approximate Percent of Human Body by Weight: 18.5 |
Importance: Component of all organic compounds
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Element: Hydrogen
Symbol: H Atomic Number: 1 Approximate Percent of Human Body by Weight: 9.5 |
Importance: Present in most organic compounds; component of water
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Element: Nitrogen
Symbol: N Atomic Number: 7 Approximate Percent of Human Body by Weight: 3.3 |
Importance: component of all proteins, phospholipids, and nucleic acids.
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Element: Calcium
Symbol: Ca Atomic Number: 20 Approximate Percent of Human Body by Weight: 1.5 |
Importance: Component of bones and teeth; important in muscle contraction, nerve impulse conduction and blood clotting.
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Element: Phosphorus
Symbol: P Atomic Number: 15 Approximate Percent of Human Body by Weight: 1.0 |
Importance: Component of phospholipids, nucleic acids, and adenosine triphosphate; important in energy transfer.
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Element: Potassium
Symbol: K Atomic Number: 19 Approximate Percent of Human Body by Weight: 0.4 |
Importance: Principal cation inside cells; important in muscle contraction and nerve impulse conduction.
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Element: Sulfur
Symbol: S Atomic Number: 16 Approximate Percent of Human Body by Weight: 0.3 |
Importance: Component of most proteins.
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Element: Sodium
Symbol: Na Atomic Number: 11 Approximate Percent of Human Body by Weight: 0.2 |
Importance: Principal cation in fluid outside cells; important in muscle contraction and nerve impulse conduction.
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Element: Chlorine
Symbol: Cl Atomic Number: 17 Approximate Percent of Human Body by Weight: 0.2 |
Principal anion in fluid outside cells; important in fluid balance.
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Element: Magnesium
Symbol: Mg Atomic Number: 12 Approximate Percent of Human Body by Weight: 0.1 |
Importance: Part of many important enzymes; necessary for bones and teeth.
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Element: Fluorine
Symbol: F Atomic Number: 9 Approximate Percent of Human Body by Weight: trace |
Importance: Aids in development of teeth and bones.
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Element: Chromium
Symbol: Cr Atomic Number: 24 Approximate Percent of Human Body by Weight: trace |
Importance: Aids in carbohydrate metabolism
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Element: Manganese
Symbol: Mg Atomic Number: 25 Approximate Percent of Human Body by Weight: trace |
Importance: Necessary for carbohydrate metabolism and bone formation.
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Element: Iron
Symbol: Fe Atomic Number: 26 Approximate Percent of Human Body by Weight: trace |
Importance: Component of hemoglobin; part of many enzymes.
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