Introduction to Cells

1
Introduction to Cells

• Ch. 6.1

2
Objectives

1. Explain Cell Theory
2. Understand microscopes
3. Prokaryotic vs. Eukaryotic cells
4. Animal vs. Plant cells

3
Who discovered cells?

• Robert Hooke
• 1665, using a light microscope
• Observed compartments in oak bark

4
Cell Theory

1. All living things are composed of cells
2. Cells are organisms basic units of structure and
   function
3. All cells come from pre-existing cells

5
Microscopes

• Opened up the world of cells
• Light Microscopes (LM) magnify up to 1000xs
• Lets review the parts!

6
Prokaryotic vs. Eukaryotic

• Prokaryotic
• Lacks nucleus
• Bacteria and Archaea

• Eukaryotic
• Has nucleus
• Has organelles surrounded by membrane
• Fungi, plants, animals

7
Plant and Animal Cell Similarities

• Plasma membrane
• Outer covering regulates traffic
• Nucleus
• Contains DNA
• Cytoplasm
• Area between nucleus and plasma membrane
  contains organelles

8
Plant and Animal Cell Differences

• Chloroplasts in plant cells
• Plant cell has cell wall
• Protection and shape
• Let's check it out!!!