Number of cells in human body (see BNID 113006 for more updated value of 3x10^13)

Range ~1e+13 cells/body
Organism Human Homo sapiens
Reference Savage DC. Microbial ecology of the gastrointestinal tract. Annu Rev Microbiol. 1977 31 DOI: 10.1146/annurev.mi.31.100177.000543 p.107 top paragraphPubMed ID334036
Primary Source [27] Dobzhansky, T. 1971. Genetics of the Evolutionary Process, Vol. 1. New York: Columbia Univ.
Comments P.107 top paragraph: "The adult human organism is said to be composed of approximately 10^13 eukaryotic animal cells (primary source). That statement is only an expression of a particular point of view. The various body surfaces and the gastrointestinal canals of humans may be colonized by as many as 10^14 indigenous prokaryotic and eukaryotic microbial cells (BNID 102392). These microbes profoundly influence some of the physiological processes of their animal host (refs 49, 103). From another point of view, therefore, the normal human organism can be said to be composed of over 10^14 cells, of which only about 10% are animal cells." There are approximately 210 types of cells in the human body. See BNID 106413
Entered by Uri M
ID 102390