1. Cellular Structure and Function
Chapter 7
Cellular Structure and Function

2. 7.1 Cell Discovery and Theory
Main Idea: The invention of the microscope led to the discovery of cells.

3. Cell Discovery
In 1665 an English scientist named Robert Hooke made a simple light microscope
First person to see “cells”
Gave them the name cells because they looked like the cells monks lived in

4. Cell Theory The cell theory is a fundamental idea of Biology
There are three parts to the cell theory
All organisms are composed of one or more cells
The cell is the basic unit of structure and organization of organisms
All cells come from cells

5. 2 Types of Microscopes Light Microscope Electron Microscope
Uses a series of lenses and visible light to magnify an image
Magnifies up to 1000X
Electron Microscope
Uses a beam of electrons to produce an image
Magnifies up to 500,000X

6. Cells Types All cells have one trait in common a plasma membrane
This is a boundary that helps control what enters and leaves the cell

7. Cell Types There are 2 basic types of cells Prokaryotic-Ex. Bacteria
Eukaryotic-Ex. Skin cells
Eukaryotic cells are generally one to one hundred times larger than Prokaryotic cells
Cell Types

8. Cell Types Eukaryotic cells Prokaryotic cells More complex structure
Have a nucleus
Have membrane bound organelles
Organelles are specialized structures in the cell
Most are multi-cellular
Prokaryotic cells
Simple structure
No nucleus
No membrane bound organelles
Most are unicellular