Diseases, Conditions, Syndromes

Iran reports 2 more deaths, 13 new cases of new coronavirus

Iranian health authorities on Friday reported two more deaths from the new virus that emerged in China and said the fatalities were from among 13 new confirmed cases of the virus in Iran.

Diseases, Conditions, Syndromes

New virus outbreaks in China and abroad rekindle concerns

An eruption of new coronavirus cases in South Korea, Iran and Chinese hospitals and prisons rekindled concerns Friday about the spread of a deadly disease that has killed more than 2,200 people.

Overweight & Obesity

Why obesity is more common than you think

The World Health Organization has described obesity as a global epidemic and one of today's "most blatantly visible yet neglected public health problems." In the last few years reports on the rise of this life-threatening ...

Diseases, Conditions, Syndromes

Lassa fever hits Lagos as Nigeria deaths top 100

An outbreak of Lassa in Nigeria has killed 103 people this year, health authorities said, as the first confirmed case was reported in the economic hub Lagos.

Diseases, Conditions, Syndromes

WHO declares 'progress' in fight against coronavirus

The World Health Organization on Wednesday hailed "tremendous progress" in the fight against the deadly new coronavirus since it emerged in China in December.

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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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