News tagged with cells
(Medical Xpress)—The first symptoms of major depression may be behavioral, but the common mental illness is based in biology—and not limited to the brain.
Psychology & Psychiatry 9 hours ago | 5 / 5 (5) | 0 |
The human gut is loaded with commensal bacteria – "good" microbes that, among other functions, help the body digest food. The gastrointestinal tract contains literally trillions of such cells, and yet the ...
Medical research May 22, 2013 | 5 / 5 (3) | 0 |
For the first time, physicists from the Max Planck Institute for Extraterrestrial Physics (MPE), biologists and physicians demonstrated the synergistic effect of cold atmospheric plasma - a partly ionized ...
Cancer 8 hours ago | 5 / 5 (3) | 0 |
Aggressive forms of bladder cancer involve the protein PODXL – a discovery that could hold the key to improved treatment, according to researchers at Lund University, Uppsala University and KTH in Sweden.
Cancer 8 hours ago | 5 / 5 (2) | 0
As the human body fine-tunes its neurological wiring, nerve cells often must fix a faulty connection by amputating an axon—the "business end" of the neuron that sends electrical impulses to tissues or other ...
Neuroscience 5 hours ago | 5 / 5 (2) | 0 |
Cinnamon: Can the red-brown spice with the unmistakable fragrance and variety of uses offer an important benefit? The common baking spice might hold the key to delaying the onset of –– or warding off ...
Alzheimer's disease & dementia 1 hour ago | 5 / 5 (2) | 0 |
(Medical Xpress)—Researchers at the University of Virginia School of Medicine have identified a promising target for treating glioblastoma, one that appears to avoid many of the obstacles that typically frustrate efforts ...
Cancer 9 hours ago | 3.5 / 5 (2) | 0 |
Italian lawmakers on Wednesday gave their final approval to a law that allows limited use of a controversial type of stem cell therapy which has been condemned by many scientists but has given hope to families of terminally-ill ...
Medical research May 22, 2013 | 5 / 5 (1) | 1
A Japanese cancer specialist said Wednesday she has started the world's first clinical trial of a powerful, non-surgical, short-term radiation therapy for breast cancer.
Cancer May 22, 2013 | 5 / 5 (1) | 0
Researchers have developed a new drug delivery system that allows inhalation of chemotherapeutic drugs to help treat lung cancer, and in laboratory and animal tests it appears to reduce the systemic damage ...
Cancer May 22, 2013 | 5 / 5 (1) | 0 |
Human breastmilk responds quickly to protect the child when there is an infection in mothers or babies, according to new international research led by The University of Western Australia.
Immunology 9 hours ago | 5 / 5 (1) | 0
(Medical Xpress)—Scientists at Emory Vaccine Center have shown that an immune regulatory molecule called IL-21 is needed for long-lasting antibody responses in mice against viral infections.
Immunology 9 hours ago | 5 / 5 (1) | 0 |
Spanish researchers have discovered that the daily clearance of neutrophils from the body stimulates the release of hematopoietic stem cells from the bone marrow into the bloodstream, according to a report published today ...
Medical research 5 hours ago | 5 / 5 (1) | 0
Scientists at the National Institutes of Health report they have discovered in mouse studies that a small molecule released in the spinal cord triggers a process that is later experienced in the brain as the sensation of ...
Medical research 3 hours ago | 5 / 5 (1) | 0 |
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.
For more information about Cell (biology), read the full article at
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