Composition of the human body

Body composition refers to the components that make up a person's body weight. These can include water, protein, fats (or lipids), hydroxyapatite (found in bones), carbohydrates (such as glycogen and glucose) and DNA. It's essential to understand that our bodies are not just made up of a single substance but are a composite of various different types of tissues and cells.<ref name="Kim2020">Kim, Jaeha,

 An overview of body composition, 
 International Journal of Bio-Science and Bio-Technology, 
 
 Vol. 12(Issue: 1),
 pp. 11–22,
 DOI: 10.14257/ijbsbt.2020.12.1.02,
 
 
 
 
 Accessed on: 2023-05-18.</ref>

Body Composition Analysis

The analysis of body composition involves assessing the percentages of the various components of the body. This can be broken down into different categories, including chemical elements, molecular types, tissue types, and cell types.

Chemical Elements

Body composition analysis can be performed by evaluating the chemical elements present in the body. This includes essential elements such as carbon, oxygen, hydrogen, nitrogen, calcium, and phosphorus, which together make up more than 99% of the body mass.

Molecular Types

At a molecular level, the body is composed mainly of water, protein, lipids, carbohydrates, and DNA. Each of these components serves vital functions in the body. For example, water acts as a solvent and helps maintain body temperature, proteins are crucial for growth and repair, and carbohydrates provide energy.

Tissue Types

In terms of tissue types, the body can be divided into water, fat, connective tissue, muscle, and bone. Body composition analysis in this context often focuses on determining the ratios of fat mass to fat-free mass. This is particularly important in the field of health and fitness, where body composition analysis can provide valuable insights into a person's health status and physical fitness level.

Cell Types

Interestingly, the body contains hundreds of different types of cells. While human cells make up the bulk of the body's mass, the largest number of cells residing in a human body are not human cells at all. Instead, they are bacteria living in the human gastrointestinal tract, playing crucial roles in digestion and the immune system.<ref name="Sender2016">Sender, Ron,

 Revised Estimates for the Number of Human and Bacteria Cells in the Body, 
 PLOS Biology, 
 
 Vol. 14(Issue: 8),
 pp. e1002533,
 DOI: 10.1371/journal.pbio.1002533,
 
 
 
 
 Accessed on: 2023-05-18.</ref>

Conclusion

Understanding body composition is essential in various fields, such as medicine, nutrition, and fitness. It allows for a more comprehensive assessment of health status than body weight alone and can provide valuable information for individualized diet and exercise plans.

See Also

• Water
• Protein
• Fats
• Carbohydrates
• DNA

References

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