In order to survive and thrive, humans and other living organisms must continuously acquire new strategies to adapt their behavior to changing environments. Past studies suggest that the synchronization between different ...
Aging is a natural process that affects all living organisms, prompting gradual changes in their behavior and abilities. Past studies have highlighted several physiological factors that can contribute to aging, including ...
(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 that these cells ...
Apr 12, 2012
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Every system in a living organism depends upon a finite supply of energy in order to function. In humans, no organ is more energy-intensive than the brain, which consumes about 20% of the body's metabolic energy.
Jan 25, 2024
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Neurons intricately communicate and respond to stimuli within a vast network, orchestrating essential functions from basic bodily processes to complex thoughts. Traditional neuroscience methods, relying on in vivo electrophysiology ...
Jan 23, 2024
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Researchers in Sweden have developed a microscale device for implantation in the eye, which presents new opportunities for cell-based treatment of diabetes and other diseases.
Oct 18, 2023
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A team of researchers has uncovered a previously unknown compensatory mechanism found in liver disease. If Kupffer cells (KCs), a specific kind of immune cells found in the liver, become impaired by tissue scarring, immune ...
Sep 28, 2023
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A protein responsible for lethal liver disease in mice infected with Rift Valley fever virus (RVFV) has been identified by scientists at the University of Pittsburgh Center for Vaccine Research. These results from new research ...
Jul 26, 2023
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Investigators at Cedars-Sinai have created computer-generated models to bridge the gap between "test tube" data about neurons and the function of those cells in the living brain. Their study, published in the journal Nature ...
Apr 25, 2023
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CU Boulder researchers have discovered a protein's crucial role in helping breast and ovarian tumors survive and thrive and have found that suppressing that protein kills cancer cells without harming healthy ones.
Apr 13, 2023
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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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