News tagged with cells

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

Prostaglandin E1 inhibits leukemia stem cells

Two drugs, already approved for safe use in people, may be able to improve therapy for chronic myeloid leukemia (CML), a blood cancer that affects myeloid cells, according to results from a University of Iowa study in mice.

12 hours ago
popularity23 comments 0

Tension makes the heart grow stronger

By taking videos of a tiny beating zebrafish heart as it reconstructs its covering in a petri dish, scientists have captured unexpected dynamics of cells involved in tissue regeneration. They found that the depleted heart ...

15 hours ago
popularity98 comments 0

Drug targeting could aid immune diseases

A new technique that targets drugs to specific cells could lead to improved therapies for diseases caused by an overactive immune response. The approach could help people affected by conditions such as arthritis and inflammatory ...

19 hours ago
popularity3 comments 0

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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