The "CELL"!!!......... What is "CELL"???????
The basic building block of a living organism is called as "CELL".
Cells are the smallest unit of a living organism. Each cell in a collective manner forms a complete organ which later on develops to a total organism. Cells from the basic functional and structural unit of all living organisms.
Anton Von Leeuwenhoek was the first person to discover and see a live cell.
THE CELL THEORY: -
The cell theory was formulated by both Matthias Schleiden (Observed and examined a large number of plant cells and stated that all plants are composed of different kinds of cells which form the tissue of the plant) Theodor Schwann (Studied different types of animal cells and reported that cells had a little thin outer layer which is known to be as the PLASMA MEMBRANE) which stated that bodies of animals and plants are composed of calls and products of cells.
Rudolf Virchow (1855) first explained that cells divided and the new cells were formed from the pre-existing cells(Omnis cellula-e-cellula). He later modified the hypothesis formulated by Schwann and Schleiden and gave it a final shape, which is today understood as: -
Rudolf Virchow (1855) first explained that cells divided and the new cells were formed from the pre-existing cells(Omnis cellula-e-cellula). He later modified the hypothesis formulated by Schwann and Schleiden and gave it a final shape, which is today understood as: -
- All living organisms are composed of cells and products of cells.
- All cells arise from pre-existing cells.
Classification of the cell: -
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