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Human Body Composition

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Elements in the human body are indicated below:

Human Body Composition
ElementShare of Body Mass


Antimony 0.000011
Arsenic 0.000026
Barium 0.000031
Beryllium 0.00000005
Boron 0.000069
Bromine 0.00029
Cadmium 0.000072
Calcium 1.5
Carbon 18
Cesium 0.0000021
Chlorine 0.15
Chromium 0.0000024
Cobalt 0.0000021
Copper 0.00010
Fluorine 0.0037
Gold 0.000014
Hydrogen 10
Iodine 0.000016
Iron 0.006
Lead 0.00017
Lithium 0.0000031
Magnesium 0.05
Manganese 0.000017
Mercury 0.000019
Molybdenum 0.000013
Nickel 0.000014
Niobium 0.00016
Nitrogen 3
Oxygen 65
Phosphorus 1.0
Potassium 0.20
Radium 0.0000000000001


Selenium 0.000019
Silicon 0.0020
Silver 0.0000010
Sodium 0.15
Strontium 0.00046
Sulfur 0.25
Tellurium 0.000012
Tin 0.000024
Titanium 0.000013
Uranium 0.00000013
Vanadium 0.000026
Zinc 0.0032
Zirconium 0.0006
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Related Topics


Human physiology, air quality and comfort temperatures, activity and metabolic rates, health effects of carbon monoxide and more.

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Typical ideal body weight versus height.

Clothing, Activity and Human Metabolism

Human metabolism at low and high activity with different levels of clothing.

Emissions from the Human Body

Gaseous polutants emissions from human bodies.

Force, Power and Human Operated Machines

Maximum force or power available in human operated machines.

Human Body - Specific Heat

Specific heat of the human body - compared to substances like protein and wood.

Human Heat Gain

Heat gain from persons in air conditioned spaces - in btu/hr.

Human Need of Air

Fresh air is required for respiration and for transport of heat and vapor emitted from the human body.

Humans - Required Rest Time

Relaxation rest time vs. working time and activity.

Mass vs. Weight

Mass vs. weight - the Gravity Force.

Met - Human Metabolic Rates

Metabiolic Rate - Met - is used as a measuring unit for human body heat or power production.

Metabolic Heat Gain from Persons

Human metabolic heat gain in air conditioned rooms.

pH in Human Biological Material

pH in human materials like blood, salvia and more.

Physiology - Activity and Metabolic Rates

Heat production from the human body vs. activity.

Survival Time in Cold Water

Time to exhaustion and death for humans in cold water.

Water - Human Activity and Consumption

Activity and average water consumption

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