News tagged with cells

Related topics: protein · cancer cells · cancer · stem cells · immune system

Slowness as organisation principle in the brain

The brain is so complex that its structure cannot be completely determined by genetics. Neuroscientists at the Ruhr-Universität Bochum (RUB) attempt to figure out which mechanisms nerve cells use to organise themselves. ...

Jul 21, 2015
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Fluorescent material reveals how cells grow

Fibre from a semiconducting polymer, developed for solar cells, is an excellent support material for the growth of new human tissue. Researchers at Linköping University have shown that the fibre glows, which makes it possible ...

Jul 21, 2015
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Exciting results from cancer immunoagent study

(Medical Xpress)—Cancer therapies have improved incrementally over the years, but cancer treatment largely remains analogous to forest fire suppression, in which the spread of fire is contained with deliberate controlled ...

Jul 20, 2015
popularity207 comments 0 report

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

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