News tagged with cells

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

Eight big questions in cancer research

Leading cancer researchers address eight of the "big questions" facing the field as part of the inaugural issue of Trends in Cancer, published by Cell Press.

Sep 29, 2015
popularity25 comments 0

Sticky gel helps stem cells heal rat hearts

A sticky, protein-rich gel created by Johns Hopkins researchers appears to help stem cells stay on or in rat hearts and restore their metabolism after transplantation, improving cardiac function after simulated heart attacks, ...

Sep 24, 2015
popularity105 comments 0

How can science help smokers to quit?

Craving for cigarettes plays a crucial role in driving people back to smoking when they try to stop. I want to explain what we think causes it and how best to deal with it to improve the chances of becoming an ex-smoker.

Sep 28, 2015
popularity17 comments 0

Metastatic breast cancer cells turn on stem cell genes

It only takes seconds: one cancerous cell breaks off from a tumor, slips into the bloodstream and quickly lodges elsewhere in the body. These colonizers may bloom into deadly metastatic cancer right away or lie dormant for ...

Sep 23, 2015
popularity143 comments 0

Hopes of improved brain implants

Neurons thrive and grow in a new type of nanowire material developed by researchers in Nanophysics and Ophthalmology at Lund University in Sweden. In time, the results might improve both neural and retinal implants, and reduce ...

Sep 29, 2015
popularity15 comments 0

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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