News tagged with living organisms
Engineered stem cells seek out, kill HIV in living organisms
(Medical Xpress) -- Expanding on previous research providing proof-of-principal that human stem cells can be genetically engineered into HIV-fighting cells, a team of UCLA researchers have now demonstrated ...
HIV & AIDS
Apr 12, 2012 |
4.8 / 5 (64) |
0
|
Scientists turn back the clock on adult stem cells aging
Researchers have shown they can reverse the aging process for human adult stem cells, which are responsible for helping old or damaged tissues regenerate. The findings could lead to medical treatments that may repair a host ...
Medical research
Sep 20, 2011 |
4.8 / 5 (26) |
16
|
More than 3,000 epigenetic switches control daily liver cycles
(Medical Xpress)—When it's dark, and we start to fall asleep, most of us think we're tired because our bodies need rest. Yet circadian rhythms affect our bodies not just on a global scale, but at the level ...
Genetics
Dec 11, 2012 |
4.8 / 5 (5) |
0
|
Researchers engineer blood stem cells to fight melanoma
Researchers from UCLA's cancer and stem cell centers have demonstrated for the first time that blood stem cells can be engineered to create cancer-killing T-cells that seek out and attack a human melanoma. The researchers ...
Cancer
Nov 28, 2011 |
5 / 5 (4) |
1
|
Mapping proteins key to human health and immune system
Proteins, the building block for all living organisms, are the ultimate transformers – able to splice and switch roles and functions within the human body. But when these changes go wrong, diseases such as cancers and ...
Medical research
Feb 17, 2012 |
5 / 5 (4) |
0
Mutated gene causes nerve cell death
Researchers identify new mechanism in the onset of incurable nerve disease The British astrophysicist Stephen Hawking is likely to be the world's most famous person living with amyotrophic lateral sclerosis ...
Medical research
Mar 13, 2013 |
5 / 5 (3) |
0
Researchers make living model of brain tumor
Brown University scientists have created the first three-dimensional living tissue model, complete with surrounding blood vessels, to analyze the effectiveness of therapeutics to combat brain tumors. The 3-D ...
Cancer
Feb 16, 2012 |
4.3 / 5 (3) |
0
|
New study unravels mystery of a DNA repair process
(Medical Xpress) -- Scientists at the University of Sussex have uncovered the mechanism of a key process in DNA repair that helps prevent neurodegenerative diseases such as ataxia.
Medical research
Mar 14, 2012 |
5 / 5 (1) |
0
|
New yeast prion helps cells survive
One of the greatest mysterious in cellular biology has been given a new twist thanks to findings reported in Science. Researchers at the RIKEN Brain Science Institute show that prions, proteins that transm ...
Medical research
Apr 23, 2012 |
5 / 5 (1) |
0
|
Molecular probes identify changes in fibronectin that may lead to disease
Fibronectin plays a major role in wound healing and embryonic development. The protein, which is located in the extracellular matrix of cells, has also been linked to pathological conditions including cancer ...
Medical research
Apr 24, 2012 |
5 / 5 (1) |
0
|
Single-port kidney removal through the belly button boosts living-donor satisfaction
In the largest study of its kind, living donors who had a kidney removed through a single port in the navel report higher satisfaction in several key categories, compared to donors who underwent traditional multiple-port ...
Surgery
Sep 12, 2012 |
5 / 5 (1) |
0
|
Lung imaging research gets its second wind
Computational fluid dynamics (CFD) provides a quantitative basis for predicting the pulmonary airflow patterns that carry inhaled materials inside the body. This is not only potentially useful for establishing safer exposure ...
Medical research
Sep 26, 2012 |
5 / 5 (1) |
0
How our nerves regulate insulin secretion
Researchers at Karolinska Institutet in Sweden have managed to graft beta cells into the eyes of mice in order to study them in a living organism over a prolonged period of time. As a result, the group and a team of colleagues ...
Medical research
Dec 10, 2012 |
5 / 5 (1) |
0
|
Specific protein essential for healthy eyes, study finds
Researchers at the Hebrew University of Jerusalem, in collaboration with researchers at the Salk Institute in California, have found for the first time that a specific protein is essential not only for maintaining a healthy ...
Neuroscience
Jan 07, 2013 |
5 / 5 (1) |
0
Inherited retinal disease research may lead to treatment
Inherited retinal disease is a major cause of vision impairment in early life - and a researcher at The University of Western Australia hopes a study in which he was involved will contribute towards the development ...
Medical research
Jan 08, 2013 |
5 / 5 (1) |
0
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.
For more information about Organism, read the full article at
Wikipedia.
This text uses material from Wikipedia and is available under the GNU Free Documentation License.
