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There are about 30 trillion (3×10¹³) human cells in the adult human body, varying from about 20 to 40 trillion depending on the sex, age and weight, and a roughly equal number of bacterial cells.^{[1][2][3][4][5][6]} The human cells have been categorized into over 400 cell types^[2] based on location and function within the body, of which about 230 types are listed here.

A family tree including all the known human cells. However, not all cells are linked to their precursor or progenitor yet.

The main cellular components of the human body by count^[4]

	Cell type	% cell count
	Erythrocytes (red blood cells)	84.0
	Platelets	4.9
	Bone marrow cells	2.5
	Vascular endothelial cells	2.1
	Lymphocytes	1.5
	Hepatocytes	0.8
	Neurons and glia	0.6
	Bronchial endothelial cells	0.5
	Epidermal cells	0.5
	Respiratory interstitial cells	0.5
	Adipocytes (fat cells)	0.2
	Dermal fibroblasts	0.1
	Muscle cells	0.001
	Other cells	2.0

The above dataset provides a nested list of cell groups with over 400 human cell types with cell count, cell size, and aggregate cell mass (biomass). See Dataset S1, Cell Group by Subgroup Tab, in this reference.^[7]

There are many different types of cells in the human body.

Major efforts to map all human cells

Several efforts have been made to make a list or a map of all human cells.^[8][9][10] One of the largest and most recent is the HuBMAP (Human BioMolecular Atlas Program).^[11] They managed to organize 1551 samples across 17 collections. However, this project still only mapped about 31 of the human bodies' 70 organs. Their datasets and visualisations place great emphasis on biomarkers and location in the body, but less on cell development and how cells can change over time. Usually specific surface proteins are used to identify cells, and based on this they are put into different categories. Another major effort to make an overview of these proteins that allows us to observe cell types is the Swedish Protein Atlas.^[12]

The Human Brain Project has attempted to map the human brain,^[13][14] although much of the publicly accessible model does not have cellular resolution.

Complete lists of human cells known so far

List of databases relevant to this list

See also

• List of human cell types derived from the germ layers
• Human Cell Atlas

References

External links

Wikimedia Commons has media related to Human cells.

• Human Cell Tree Map
• Human Cell Atlas