Results
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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... |
| Number of bacteria on skin | Human Homo sapiens | 1e+12 | unitless | 105712 | Berg RD. The indigenous... |
| Number of receptors on each taste bud | Human Homo sapiens | 50-150 | unitless | 100702 | http://faculty.washi... |
| Number of cell divisions in an average human lifespan | Human Homo sapiens | ~1E+16 | Cell divisions | 100379 | Weinberg, R. The Biology... |
| Number of microvilli per cell on HeLa cell | Human Homo sapiens | 200 | microvilli/cell | 102481 | Fisher HW, Cooper TW.... |
| Hayflick's limit - number of times normal human cells divide | Human Homo sapiens | 50 (±10) | unitless | 105586 | Hayflick L. The limited... |
| Number of fibers in human optic nerve | Human Homo sapiens | 1.2e+6 | unitless | 100696 | Balazsi AG, Rootman J... |
| Number of antigen-receptor molecules on T cell surface | Human Homo sapiens | 30000 | receptors/cell | 103567 | Janeway's Immunobiology... |
| Number of bacteria in the human intestinal tract | Human Homo sapiens | ≤1E+14 | bacteria/intestinal tract | 110957 | Suau A et al., Direct... |
| Number of ion transport sites on red blood cell membrane | Human Homo sapiens | 1e+6 | membrane transport sites/cell | 111367 | Brahm J. Temperature... |
| Number of bird specimens on Earth | Biosphere | 200 - 400 | billion (10^9) birds | 116940 | Kevin J. Gaston & Tim... |
| Number of People Who Have Ever Lived on Earth | Human Homo sapiens | 1.08e+11 | Humans | 111241 | Population Reference... |
| Number of functional gene segments in human immunoglobulin loci | Human Homo sapiens | Figure - link | N/A | 111352 | Kenneth M. Murphy, Paul... |
| 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.... |
| 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 hairs in human eyebrows | Human Homo sapiens | 600 | unitless | 101511 | Amazing numbers in biology... |
| Number of cilia on cells that contain multiple cilia | Human Homo sapiens | 200-300 | unitless | 105742 | Fliegauf M, Benzing T... |
| Number of validated hormone-responsive androgen receptor target genes in immortalized human prostate epithelial cell line | Human Homo sapiens | 172 | target genes | 117006 | Carroll SB. Evo-devo... |
| Data on the concentration of components of human plasma proteins | Human Homo sapiens | Table - link | N/A | 112317 | Krebs HA. Chemical c... |
| Number of cell types in human body | Human Homo sapiens | 200 | Unitless | 103626 | Junqueira, Carneiro, Kelley... |