LN# 8Cells

Cells

• Cells are the basic unit of living organisms.

• The cell theory describes the connection between living things and cells.

• The cell theory has 3 parts.

The Cell Theory

1. All organisms are made of one or more cells.

2. The cell is the basic unit of organization of organisms.

3. All cells come from preexisting cells.

Prokaryote vs. Eukaryote

• There are two types of cells.

1. Prokaryotic cells• Do not have membrane

bound organelles.• They make up single

celled organisms called bacteria.

2. Eukaryotic cells• Contain membrane

bound organelles.• They make up single and

multi cellular organisms.• Multi = humans• Single = paramecium

Organelles

• Membrane bound structures inside the cell.

• Organelles allow specialized functions to occur inside the cell.

• Some organelles include:– Mitochondria– Chloroplast– Nucleus – Plasma membrane

Plant vs. Animal Cells

Only in Plant Cells

• Cell wall– provides structure and support– also found in bacteria and fungi

• Chloroplast– uses energy from the sun to make

carbohydrates

• Large vacuole– used for storage

Only in Animal Cells

• Centriole– help cell during cell division

Summary

1. What is a cell?2. What are the parts of the cell theory?3. What is a prokaryotic cell?4. What is a eukaryotic cell?5. What are organelles?6. What is the difference between a plant and

animal cell?7. What is a chloroplast?8. What is a centriole?