1. Cell is the structural and functional nuit of life
2. All organism are composed of cells ,some are composed of a single cell called -Unicellular organism and some are composed many cell are called Multicellular organism
3. Study of cell called - cytology
4. Father of cytology- Robert Hooke,discoverd the nucleus - Robert Brown (1831)
5. Robert Hooke wrote the book- micrographia
6. Mattias Schileden ( German botanist), Theodore Schwann (British zoologist) gave the cell theory
8. Theory -" all organism are composed of cells and products of cells"
All cells arise from the pre- existing cells
9. Pre- existing cells/ omnis cellua- e cellua called " Rudolf Virvhow"
