News tagged with organisms

Related topics: cells , protein , bacteria , genes , mutations

DMV program can generate additional organ donors

(HealthDay)—A brief, web-based training program for department of motor vehicles (DMV) employees that educates them about organ and tissue donation can increase the likelihood of customers registering as ...

Apr 23, 2015
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Tragic newborn was UK's youngest organ donor

A newborn baby who died after just 100 minutes became Britain's youngest organ donor after his kidneys and heart valves were given to adult patients, the National Health Service (NHS) said Thursday.

Apr 23, 2015
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One child in five still not vaccinated: WHO

One-fifth of the world's children are still not receiving routine life-saving vaccinations and efforts to ensure global immunisation coverage remain "far off track," the World Health Organization said Wednesday.

Apr 22, 2015
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A recipe for long-lasting livers

People waiting for organ transplants may soon have higher hopes of getting the help that they need in time. Researchers at the RIKEN Center for Developmental Biology have developed a new technique that extends ...

Apr 22, 2015
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Organism

In biology, an organism is any living system (such as animal, plant, fungus, or micro-organism). In at least some form, all organisms are capable of response to stimuli, reproduction, growth and development, and maintenance of homeostasis as a stable whole. An organism may either be unicellular (single-celled) or be composed of, as in humans, many billions of cells grouped into specialized tissues and organs. The term multicellular (many-celled) describes any organism made up of more than one cell.

The terms "organism" (Greek ὀργανισμός - organismos, from Ancient Greek ὄργανον - organon "organ, instrument, tool") first appeared in the English language in 1701 and took on its current definition by 1834 (Oxford English Dictionary).

Scientific classification in biology considers organisms synonymous with life on Earth. Based on cell type, organisms may be divided into the prokaryotic and eukaryotic groups. The prokaryotes represent two separate domains, the Bacteria and Archaea. Eukaryotic organisms, with a membrane-bounded cell nucleus, also contain organelles, namely mitochondria and (in plants) plastids, generally considered to be derived from endosymbiotic bacteria. Fungi, animals and plants are examples of species that are eukaryotes.

More recently a clade, Neomura, has been proposed, which groups together the Archaea and Eukarya. Neomura is thought to have evolved from Bacteria, more specifically from Actinobacteria.

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