News tagged with cells

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

Id genes play surprise role in cardiac development

Researchers from Sanford Burnham Prebys Medical Discovery Institute (SBP), the Cardiovascular Institute at Stanford University and other institutions were surprised to discover that the four genes in the Id family play a ...

1 hour ago
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Blood test predicts prostate tumor resistance

When bacteria develop antibiotic resistance, treatment with these medications becomes ineffective. Similarly, tumor cells can also change in such a way that renders them resistant to particular medications. This makes it ...

3 hours ago
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New test for rare immunodeficiency

Researchers at the University of Basel have developed a test to quickly and reliably diagnose a rare and severe immune defect, hepatic veno-occlusive disease with immunodeficiency. They reported on their findings in the Journal ...

3 hours ago
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Brain region mediates pleasure of eating

Providing the body with food is essential for survival. But even when full, we can still take pleasure in eating. Researchers at the Max Planck Institute of Neurobiology in Martinsried and the Friedrich Miescher Institute ...

6 hours ago
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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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