It has 20, 000 central nervous system cells so big they can be seen without a microscope. (Humans have 100 billion brain cells.) Kandel turned down an offer to run the psychiatry department at Harvard's Beth Israel Hospital and bet his career on the slugs.

FORBES: Viagra for the Brain

And if countries do accept the need for research involving human stem cells, a central bank with material available to all researchers is more efficient.

BBC: Embryonic stem cells can be turned into any kind of cell

Synapses are the junctions between nerve cells, and their action is central to learning and memory.

ECONOMIST: Eat your way to a better brain

Huntington's disease is an hereditary neurological disorder of the central nervous system that causes progressive degeneration of cells in the brain, slowly impairing a person's ability to walk, think, talk and reason.

BBC: Rookwood Hospital, Cardiff

Lupus is an autoimmune disease characterized by inflammation of the joints, skin, major organs and central nervous system as the immune system attacks healthy tissues and cells.

FORBES: Lupus Treatment Evades Genentech, Biogen

These mini cells work together as HetNets (heterogeneous networks) and will be a central feature in the next decade of wireless expansion.

FORBES: Damming the Digital River

To solve the problem, doctors sometimes resort to the radical step of using lasers to kill retina cells responsible for peripheral vision in order to preserve enough oxygen for those engaged in central vision.

FORBES: Pfizer Eyes New Use For Stem Cells

This country has an estimated 220 gigawatts of what you might call amateur power: emergency generators, industrial fuel cells and other user-owned power plants, compared with 1, 000 or so gigawatts of central station capacity.

FORBES: Magazine Article

While the detection of viruses is distributed over the Internet, for example, just as the cells of the immune system are spread throughout the body, there is no biological equivalent of the central analysis centre.

ECONOMIST: A thousand ills require a thousand cures