January 27, 2007
1
ORGANIZATION OF LIFE = CELL
• Cell
The basic unit of the body is called cell. In the early days, when the lenses or microscopes had how the bodies of `living not yet been invented, man was not aware of organisms were made? Whether they possess an undivided body, in which different organs (in animal, bones and blood vessels) are arranged systematically or their bodies are made up of small identical structural units, as bricks form a building.
The discovery of cell and theory ROBERT HOOK (1665) Robert hook first studied thin slices of cork and lea yes under compound microscope .He noticed in them small box like chambers of the small size, which he named as cell.. ROBERT BROWN (1831-1833) Robert brown discovered nucleus mettle cell. MATHIAS SCHLEIDEN (1838) Mathias schleiden a German botanist claimed that all plants were made up of cells. THEODRE SCHWANN (1839) Theodre Schwann ascertaining that animal were also made up of cells which are similar to plant cells. Thus schleiden and Schwann propounded cell theory be all organism are made from cells. J. PURKINJI (1840) J. purkinji used the term protoplasm for the materials found in the cell.
Prepared by: Saira Mobeen
COM Student
UE, Jauharabad.