News tagged with cells

Related topics: protein · cancer cells · cancer · stem cells · immune system

Genetic control of immune cell proliferation

Germinal centers are transient structures in the lymph nodes where antibody-producing B cells proliferate and differentiate at extraordinary rates. Germinal centers can be visually divided into a dark zone and light zone. ...

Apr 19, 2017
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What Netflix can teach us about treating cancer

Two years ago, former President Barack Obama announced the Precision Medicine initiative in his State of the Union Address. The initiative aspired to a "new era of medicine" where disease treatments could be specifically ...

Apr 19, 2017
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Doctor discusses pediatric heart pump trial

During the wait for a heart transplant, patients with advanced heart failure can be supported with a ventricular assist device, an artificial pump that helps the heart move blood through the body. But the VAD now used for ...

Apr 19, 2017
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Master detox molecule boosts immune defenses

Scientists at the Luxembourg Institute of Health (LIH) have discovered hitherto unknown molecular mechanism by which the human immune system activates its immune cells. T cells that express a gene known as Gclc effectively ...

Apr 19, 2017
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Cell (biology)

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

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