1. Cells and Heredity Chapter 1 Lesson 1
Discovering Cells
Cells and Heredity Chapter 1 Lesson 1

2. What are Cells
Cells are the basic unit of structure and function in living things
Structure
Describe what it is made of and how its parts are put together
Function
Processes that enable it to live, grow, and reproduce

3. Cell Theory
Widely accepted explanation of the relationship between cells and living things
All living things are composed of cells
Cells are the basic units of structure and function in living things
All cells are produced from other cells

4. Cell Theory-Timeline Robert Hooke (1663) Anton van Leeuwenhoek (1674)
first to see cells (dead; cork)
Anton van Leeuwenhoek (1674)
First to see living cells
Matthias Schleiden (1838)
Concluded all plants are made of cells
Theodor Schwann (1838)
Concluded all animals are made of cells
Rudolf Virchow (1855)
All cells come from other cells

5. Microscopes: Magnification and Lenses
Compound light microscope
Focus light through lenses to produce a magnified image
Magnification
Things appearing larger than they are
If light does not reach the lens (pass through the object) you will not see anything

6. Microscopes: Measuring microscopic objects
Resolution
Helps you see details of an objects structure

7. Electron microscopes Electron microscope
Use beams of electrons to produce a magnified image
Better magnification and resolution