What makes blood vessels grow?

Blood vessels must adapt their growth to the nutrients available in their surroundings so that they can keep organs adequately supplied. A team led by Michael Potente has identified two proteins that are important for this ...

Medical research

What a tiny, wiggling worm can teach us about cancer

One would think a transparent, tiny—about one millimeter in length—organism could have difficulty catching anyone's attention. The roundworm Caenorhabditis elegans (C. elegans), however, has been in the biological research ...

Oncology & Cancer

Using electricity to treat cancer

Electricity has formed the basis of many aspects of the modern world, from providing reliable sources of light to powering home appliances and computers. Now, researchers are studying how electricity can be harnessed as a ...

Oncology & Cancer

Cause of metastasis in prostate cancer discovered

Prostate cancers remain localized in the majority of cases, giving affected individuals a good chance of survival. However, about 20% of patients develop incurable metastatic prostate cancer, resulting in approximately 5,000 ...

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Cell division

Cell division is a process by which a cell, called the parent cell, divides into two or more cells, called daughter cells. Cell division is usually a small segment of a larger cell cycle. This type of cell division in eukaryotes is known as mitosis, and leaves the daughter cell capable of dividing again. The corresponding sort of cell division in prokaryotes is known as binary fission. In another type of cell division present only in eukaryotes, called meiosis, a cell is permanently transformed into a gamete and cannot divide again until fertilization. For simple unicellular organisms such as the amoeba, one cell division is equivalent to reproduction-- an entire new organism is created. On a larger scale, mitotic cell division can create progeny from multicellular organisms, such as plants that grow from cuttings. Cell division also enables sexually reproducing organisms to develop from the one-celled zygote, which itself was produced by cell division from gametes. And after growth, cell division allows for continual construction and repair of the organism. A human being's body experiences about 10,000 trillion cell divisions in a lifetime.

The primary concern of cell division is the maintenance of the original cell's genome. Before division can occur, the genomic information which is stored in chromosomes must be replicated, and the duplicated genome separated cleanly between cells. A great deal of cellular infrastructure is involved in keeping genomic information consistent between "generations".

This text uses material from Wikipedia, licensed under CC BY-SA