This presentation you will get how the cell theory developed. Robert Hooke observed cells in cork and coined the term "cells”. Anton Van Leeuwenhoek observed first living cells under the simple microscope. Matthias Schleiden (1838) German lawyer turned botanist, concluded that, despite differences in the structure of various tissues, plants were made of cells and that the plant embryo arose from a single cell. In 1839, Theodor Schwann, a German zoologist and colleague of Schleiden’s, published a comprehensive report on the cellular basis of animal life. Schwann concluded that the cells of plants and animals are similar structures. By 1855, Rudolf Virchow, a German pathologist concluded that “Omnis cellula e cellula”- new cells are formed only from pre-existing cells. All organisms are composed of one or more cells. 2) The cell is the structural unit of life. 3) Cells can arise only by division from a pre-existing cell

1. CELL THEORY
- Jyotsna Galande

2. Inside the unit
 History/ Development
 Cell theory

3. History/ Development of cell theory
Robert Hooke observed cells in cork and coined the term "cells”.

4. Anton Van Leeuwenhoek observed first living cells under the
simple microscope

5. • Robert Brown discovered the
nucleus.

6. • Matthias Schleiden (1838) German lawyer turned botanist, concluded
that, despite differences in the structure of various tissues, plants were
made of cells and that the plant embryo arose from a single cell.

7. • . In 1839, Theodor Schwann, a German zoologist and colleague of
Schleiden’s, published a comprehensive report on the cellular basis of
animal life. Schwann concluded that the cells of plants and animals are
similar structures.

8. • By 1855, Rudolf Virchow, a German pathologist concluded that
“Omnis cellula e cellula”- new cells are formed only from pre-existing
cells.

9. 3 Tenets Of Cell Theory
1) All organisms are composed of one or more cells.
2) The cell is the structural unit of life.
3) Cells can arise only by division from a pre-existing cell.