News tagged with cells

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

Do gut bacteria rule our minds?

It sounds like science fiction, but it seems that bacteria within us—which outnumber our own cells about 100-fold—may very well be affecting both our cravings and moods to get us to eat what they want, ...

Aug 15, 2014
popularity 4.8 / 5 (54) | comments 18

An attractive solution for heart repair

Stem cell therapy is a promising option for repairing heart tissue damaged by heart attack. However, the main obstacle to cardiac stem cell therapy also happens to be pretty difficult to get around – and ...

Aug 15, 2014
popularity 4.9 / 5 (9) | comments 0

New ways to treat solid tumours

(Medical Xpress)—An international team of scientists has shown that an antibody against the protein EphA3, found in the micro-environment of solid cancers, has anti-tumour effects. 

Aug 15, 2014
popularity 5 / 5 (3) | comments 0

Zebrafish help to unravel Alzheimer's disease

New fundamental knowledge about the regulation of stem cells in the nerve tissue of zebrafish embryos results in surprising insights into neurodegenerative disease processes in the human brain. A new study by scientists at ...

Aug 19, 2014
popularity 5 / 5 (3) | 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.

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