Medical research

New method visualizes groups of neurons as they compute

Using a fluorescent probe that lights up when brain cells are electrically active, MIT and Boston University researchers have shown that they can image the activity of many neurons at once, in the brains of mice.

Oncology & Cancer

Scientists help immune system find hidden cancer cells

Cancer cells are masters at avoiding detection, but a new system developed by Yale scientists can make them stand out from the crowd and help the immune system spot and eliminate tumors that other forms of immunotherapies ...

Oncology & Cancer

Drug shows promise as immune therapy for cancer

A therapy developed by Yale researchers stimulates immune cells to shrink or kill tumors in mice, according to a new study published in the Journal of Experimental Medicine. The therapy is effective alone or in combination ...

Oncology & Cancer

Unique immune cell could help stop breast cancer

A unique type of immune cell has been discovered in human breast tissue, and breast cancer patients with more of these cells are more likely to survive, finds new research from the Francis Crick Institute and King's College ...

Medical research

Compound in breast milk fights harmful bacteria

Researchers at National Jewish Health and the University of Iowa have identified a compound in human breast milk that fights infections by harmful bacteria while allowing beneficial bacteria to thrive. Human breast milk has ...

Medical research

New genetic link found for some forms of SIDS

A genetic link has now been found for some instances of Sudden Infant Death Syndrome, or SIDS. The new UW Medicine research study is the first to make an explainable link tracking the mechanism between a genetic anomaly and ...

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Cell (biology)

The cell is the structural and functional unit of all known living organisms. It is the smallest unit of an organism that is classified as living, and is often called the building block of life. Some organisms, such as most bacteria, are unicellular (consist of a single cell). Other organisms, such as humans, are multicellular. (Humans have an estimated 100 trillion or 1014 cells; a typical cell size is 10 µm; a typical cell mass is 1 nanogram.) The largest known cell is an unfertilized ostrich egg cell.

In 1835 before the final cell theory was developed, a Czech Jan Evangelista Purkyně observed small "granules" while looking at the plant tissue through a microscope. The cell theory, first developed in 1839 by Matthias Jakob Schleiden and Theodor Schwann, states that all organisms are composed of one or more cells. All cells come from preexisting cells. Vital functions of an organism occur within cells, and all cells contain the hereditary information necessary for regulating cell functions and for transmitting information to the next generation of cells.

The word cell comes from the Latin cellula, meaning, a small room. The descriptive name for the smallest living biological structure was chosen by Robert Hooke in a book he published in 1665 when he compared the cork cells he saw through his microscope to the small rooms monks lived in.

This text uses material from Wikipedia, licensed under CC BY-SA