(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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Exercise helps to prevent the degradation of cartilage caused by osteoarthritis, according to a new study from Queen Mary University of London.
Mar 27, 2019
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The Baudry Lab at The University of Alabama in Huntsville (UAH) has identified 125 naturally occurring compounds that have a computational potential for efficacy against the COVID-19 virus from the first batch of 50,000 rapidly ...
Jun 19, 2020
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Vaccines are one of our greatest tools to protect against infectious diseases and the world waits with bated breath for a vaccine against coronavirus (COVID-19). The wait might be much shorter if we can hone new methods of ...
Mar 30, 2020
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One of the many effects of aging is loss of muscle mass, which contributes to disability in older people. To counter this loss, scientists at the Salk Institute are studying ways to accelerate the regeneration of muscle tissue, ...
May 25, 2021
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New research from the University of East Anglia and Quadram Institute reveals how our immune cells use the body's fat stores to fight infection.
Dec 8, 2021
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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 ...
Sep 20, 2011
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When we learn the connections between neurons strengthen. Addiction or other neurological diseases are linked to abnormally strong connections. But what does learning look like on the cellular and molecular level? How do ...
Apr 23, 2018
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Everybody knows by now that the United States and the world are in the grip of one of the dangerous coronaviruses called COVID-19, but what's a virus and how can it make us feel ill? Why do our bodies react the way they do? ...
Mar 23, 2020
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(Medical Xpress)—University of Washington scientists have succeeded in removing the extra copy of chromosome 21 in cell cultures derived from a person with Down syndrome, a condition in which the body's cells contain three ...
Nov 9, 2012
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The cell is the structural and functional unit of all known living organisms. It is the smallest unit of an organism that is classified as living, and is often called the building block of life. Some organisms, such as most bacteria, are unicellular (consist of a single cell). Other organisms, such as humans, are multicellular. (Humans have an estimated 100 trillion or 1014 cells; a typical cell size is 10 µm; a typical cell mass is 1 nanogram.) The largest known cell is an unfertilized ostrich egg cell.
In 1835 before the final cell theory was developed, a Czech Jan Evangelista Purkyně observed small "granules" while looking at the plant tissue through a microscope. The cell theory, first developed in 1839 by Matthias Jakob Schleiden and Theodor Schwann, states that all organisms are composed of one or more cells. All cells come from preexisting cells. Vital functions of an organism occur within cells, and all cells contain the hereditary information necessary for regulating cell functions and for transmitting information to the next generation of cells.
The word cell comes from the Latin cellula, meaning, a small room. The descriptive name for the smallest living biological structure was chosen by Robert Hooke in a book he published in 1665 when he compared the cork cells he saw through his microscope to the small rooms monks lived in.
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