1. Structure and Function of Cells:
Cell Theory

2. Discovery of Cells
Cells were discovered with the invention of the MICROSCOPE in the early 17th century
Scientists:
Robert Hooke
Cork; full of little boxes
Reminded him of small rooms Cells!
Dead plant cells
Anton Van Leeuwenhoek 1632 – 1723
Dutch, made microscopes
Living Cells

3. Cells
The smallest unit of matter that can carry out all the processes of life

4. Gathering Evidence for the Cell Theory
Matthias Schleiden (1838), ALL PLANTS are composed of cells
Theodor Schwann (1839), ALL ANIMALS are composed of cells
Rudolf Virchow (1855), cells come ONLY from other cells

5. Development of the cell theory
1. All living things are composed of one or more cells
2. Cells are the basic unit of structure and function in an organism
3. Cells come from the reproduction of existing cells.