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What makes up the human body?

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Body composition may be analyzed in terms of molecular type e.g., water, protein, connective tissue, fats, hydroxylapatite, carbohydrates and DNA. In terms of tissue type, the body may be analyzed into water, fat, muscle, bone, etc. In terms of cell type, the body contains hundreds of different types of cells, but notably, the largest number of cells contained in a human body are not human cells, but bacteria residing in the normal human gastrointestinal tract. read more

The human body, like all organic compounds, contains a significant amount of carbon. Oxygen, carbon, hydrogen, nitrogen, calcium and phosphorus are the elements that make up 99 percent of the human body's mass. read more

Nitrogen (3%) is found in many organic molecules, including the amino acids that make up proteins, and the nucleic acids that make up DNA. Calcium (1.5%) is the most common mineral in the human body — nearly all of it found in bones and teeth. read more

Almost 99% 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. All 11 are necessary for life. read more

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