The development of cell theory began with Robert Hooke coining the term "cell" after observing plant cells under a microscope. Robert Brown discovered that cells contain a nucleus. Matthias Schleiden and Theodor Schwann established that plants and animals are respectively composed of cells. Modern cell theory states that the cell is the basic unit of structure and function in living things, cells have similar components, new cells are formed via cell division, and cells in multicellular organisms are specialized to perform specific functions. Prokaryotes are cells without nuclei while eukaryotes contain nuclei.

2. CELL THEORY
DEVELOPMENT
ROBERT HOOKE
He coined the
the term,
“cells”.

3. ROBERT BROWN
He
discovered
that cells
have
“nucleus”.

4. MATTHIAS SCHLEIDEN
Plants are
composed
of “cells”.

5. THEODOR SCHWANN
“All animals
are composed
of cells.”

6. Modern cell theory includes the
following statements:
1. The cell – the smallest structural and functional
unit of life.
2. The cells of all living organisms are similar in
structure and chemical composition, metabolic
processes and the most important
manifestations of life.
3. The new cells are formed by the division of the
mother cell.
4. The cells of multi-cellular organisms are
specialized by function and form tissues, which
make up the organs.

8. PROKARYOTIC & EUKARYOTIC

9. What is prokaryotes?
Cells without nucleus
Pro – “before”
Karyon – “nut or kernel”

10. What is eukaryotes?
Cells with nucleus
Eu – “true”
Karyon – “nut or kernel”

11. Animal Cell & Plant Cell