A new technique reported in Science this week overcomes several limitations of typical high-throughput chemical screens conducted on cell samples. Such screens are commonly used to try to discover new cancer drugs, and in ...
12 hours ago
0
19
Bright light at night interrupts the body's normal day-night cycles, called circadian rhythms, and can trigger insomnia. In fact, circadian rhythms play a major role in health. Disrupted day-night cycles have even been linked ...
12 hours ago
0
47
A new approach to programing cancer-fighting immune cells called CAR-T cells can prolong their activity and increase their effectiveness against human cancer cells grown in the laboratory and in mice, according to a study ...
13 hours ago
0
277
In the United States, apart from some forms of skin cancer, breast cancer is the most common cancer in women. It is also the most common cause of death from cancer among Hispanic women and the second most common among all ...
13 hours ago
0
1
Prostate cancer is the most common noncutaneous malignancy in the United States and is responsible for many male deaths. The development of prostate carcinogenesis is initially androgen-dependent.
13 hours ago
0
0
Sticks and stones may break one's bones, but healing them requires the production of a protein signal that stimulates the generation, growth and spread of vital nerve cells, or neurons, throughout the injured area. That's ...
14 hours ago
0
78
Goblet cells are epithelial cells that produce mucins and disperse tears which help the surface of eyes maintain their wet environment. Goblet cells are closely related to autoimmune diseases including dry eyes and chemical ...
14 hours ago
0
1
New research by scientists at Harvard Medical School has found that nerves in the guts of mice do not merely sense the presence of Salmonella but actively protect against infection by this dangerous bacterium by deploying ...
15 hours ago
1
81
What if a clock did a better job than a scale at promoting weight loss, improving sleep and preventing diabetes? New research suggests it's about time to consider that possibility.
15 hours ago
0
1553
The dentate gyrus is the "input point" for the hippocampus part of the brain. It transmits information from the short term memory to the long term. It consists of granule cells, which are especially dense in this area of ...
16 hours ago
0
1
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
