A team of medical researchers from the U.S., China and Germany reports that when a mouse feels stressed, its brain sends signals to a gut gland that leads to elimination of a type of bacteria that prevents inflammation and ...
Alzheimer's, Parkinson's, and other neurological disorders can be seen as "dirty brain" diseases, where the brain struggles to clear out harmful waste. Aging is a key risk factor because, as we grow older, our brain's ability ...
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A new vaccine against cancer-causing human papillomaviruses (HPV) is intended to help increase the rate of HPV vaccinations, particularly in developing countries. Scientists at the German Cancer Research Center (DKFZ) have ...
Aug 14, 2024
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A WEHI study could help solve a long-standing mystery into why a key immune organ in our bodies shrinks and loses its function as we get older. The thymus is an organ essential for good health due to its ability to produce ...
Aug 14, 2024
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The discovery of a new regulator affecting immune cells could lead to new treatments to reduce inflammation in diseases including arthritis and severe COVID 19.
Aug 14, 2024
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Scientists from Duke-NUS Medical School and the Mechanobiology Institute (MBI) at the National University of Singapore (NUS) have discovered a novel pathway to wake up dormant neural stem cells, offering potential new therapies ...
Aug 14, 2024
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A Berlin-led research team has uncovered critical regulators of severe kidney damage in patients with lupus, an autoimmune disorder affecting an estimated five million people worldwide, most of whom are young women. A small, ...
Aug 14, 2024
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Researchers at Children's Hospital of Philadelphia (CHOP), St. Jude Children's Research Hospital (St. Jude) and the Children's Oncology Group (COG) today announced a significant paradigm shift in the understanding of T-lineage ...
Aug 14, 2024
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National Institutes of Health (NIH) researchers have discovered that while artificial intelligence (AI) tools can make accurate diagnoses from textbook-like descriptions of genetic diseases, the tools are significantly less ...
Aug 14, 2024
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Endometriosis is a disease in which tissue similar to what lines the uterus grows outside of it. The disease, which affects 10% of women of reproductive age worldwide, causes severe pain and often infertility. Many of the ...
Aug 14, 2024
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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.
This text uses material from Wikipedia, licensed under CC BY-SA
