When We analyze an organism’s body, for example mango plant, we will see part of the plant that get smaller and smaller. The same thing happens if we analyze animal or human body. If the analysis is continuously done, we will get the smallest unit of living organism, That is cell.
Theory Of cell
|Robert Hooke and the microscope use to analyze cork cell|
At the end of 1678, Antony van leeuwenhoek (Dutch, 1632-1723 ) become the first person who saw a very small living organism in straw soak by using a simple microscope.
In 1809, Jean Babtiste de lamark (French, 1744-1829) said that every living organism was composed of cells and in each cell there moved complex liquid.