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Saturday, 24 January 2015

The Cell theory

cell

The cell is the smallest unit of life, capable of metabolic and reproduction to create or use energy to perform their tasks functions. This is named after Robert Hooke, in 1665, observing thin slices of cork, called "small cells" for the hexagonal spaces he saw in them (Alexander et al 1992;. Smith, 1995; Galvan and Bojorques, 2002; Velasquez , 2005).

Cell theory

Matthias Jacob Schleiden and Theodor Schwann, were the first researchers to generalize and interpret observations on the cell. With the evidence gathered by various researchers, the findings of Shcleiden in plant cells and Schwann their own research published in 1839, in which he proposed the idea that all living organisms are formed from the same type of elementary structure the cell. Made with which was formally established the cell theory.

The cell theory can be summarized in the following statements:

All organisms are composed of one or more cells.

The cell is the fundamental unit of structure and purpose of organisms.

The new stem cells for cell reproduction of cells that already exist