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Property Organism Value Units ID Details
Number of hairs on human head Human Homo sapiens 90,000-150,000 unitless 101509 Amazing numbers in biology...
Estimates on the total number of phosphoproteins and p-sites for the various species (human, mouse, Arabidopsis and yeast), based on different analyses Eukaryotes Table - link N/A 113378 Vlastaridis P et al....
The distribution of the number of human cells by cell type Human Homo sapiens Figure - link N/A 112985 Sender R, Fuchs S, Milo...
Total number of phosphoproteins and phosphorylation-sites Human Homo sapiens phosphoproteins ~12,800: phosphorylation sites ~230,000 Table - link N/A 113386 Vlastaridis P et al....
Number of cell divisions in an average human lifespan Human Homo sapiens ~1E+16 Cell divisions 100379 Weinberg, R. The Biology...
Data on the concentration of components of human plasma proteins Human Homo sapiens Table - link N/A 112317 Krebs HA. Chemical c...
Number of hairs in human eyebrows Human Homo sapiens 600 unitless 101511 Amazing numbers in biology...
Number of protein kinases in the human genome Human Homo sapiens 523 unitless 101655 Stewart Scherer. A Short...
Number of human pathogens Various 1407 (538 bacteria: 317 fungi: 287 helminths: 208 viruses or prions: 57 protozoa) Pathogenic species 106626 Mark Woolhouse, Sonya...
Number of bacteria on skin Human Homo sapiens 1e+12 unitless 105712 Berg RD. The indigenous...
Derived osteocyte network quantities for the human skeleton Human Homo sapiens Table - link N/A 111545 Buenzli PR, Sims NA....
Bacterial-human [B/H] cell ratio for different populations Human Homo sapiens Table - link N/A 112984 Sender R, Fuchs S, Milo...
Total number of osteocytes within the average adult human skeleton Human Homo sapiens ~4.2E+10 Table - link osteocytes 111547 Buenzli PR, Sims NA....
Number of cell types in human body Human Homo sapiens 200 Unitless 103626 Junqueira, Carneiro, Kelley...
Number of fibers in human optic nerve Human Homo sapiens 1.2e+6 unitless 100696 Balazsi AG, Rootman J...
Number of hairs in human eye lashes Human Homo sapiens 420 unitless 101510 Amazing numbers in biology...
Number of microbial cells in human body Human Homo sapiens 10^14 (see BNID 113000 for more updated value of 3.8x10^13) microbial cells (mostly bacteria)/human body 102392 Savage DC. Microbial...
Number of bacteria in the human intestinal tract Human Homo sapiens ≤1E+14 bacteria/intestinal tract 110957 Suau A et al., Direct...
Number of cells in human body (see BNID 113006 for more updated value of 3x10^13) Human Homo sapiens ~1e+13 cells/body 102390 Savage DC. Microbial...
Hayflick's limit - number of times normal human cells divide Human Homo sapiens 50 (±10) unitless 105586 Hayflick L. The limited...