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Light micrograph of a moss's leaf cells at 400X magnification. The following outline is provided as an overview of and topical guide to cell biology: . Cell biology – A branch of biology that includes study of cells regarding their physiological properties, structure, and function; the organelles they contain; interactions with their environment; and their life cycle, division, and death.
The Human Cell Atlas will catalogue a cell based on several criteria, specifically the cell type, its state, its location in the body, the transitions it undergoes, and its lineage. [8] It will gather data from existing research, and integrate it with data collected in future research projects. [ 3 ]
Among the many-celled groups are animals and plants. The number of cells in these groups vary with species; it has been estimated that the human body contains around 37 trillion (3.72×10 13) cells, [7] and more recent studies put this number at around 30 trillion (~36 trillion cells in the male, ~28 trillion in the female). [8]
On 2021, Stephen Quake guessed that the upper limit of the number of human cell types would be around 6000, based on a reasoning that "if biologists had discovered only 5% of cell types in the human body, then the upper limit of cell types to discover is somewhere around 6000 (i.e., 300/0.05)." [10] Other different efforts have used different ...
Foot-like processes are also present in Müller glia (modified astrocytes of the retina), [3] pancreatic stellate cells, [4] dendritic cells, [5] oligodendrocytes, [6] and others. Microglia , which are notably smaller than macroglia , can also extend their end-processes to contact areas of capillaries that are devoid of astrocyte endfeet , and ...
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In cell biology, an organelle is a specialized subunit, usually within a cell, that has a specific function.The name organelle comes from the idea that these structures are parts of cells, as organs are to the body, hence organelle, the suffix -elle being a diminutive.
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