1. Cells
Living Environment

2. Objectives…I can…
Explain the contributions that led to the development of the cell theory.
Describe the levels of organization within organisms.
Describe the structure and function of cell organelles.
Understand the distinguishing characteristics between animal and plant cells.

3. Two Types of Cells
A. prokaryotic cells – very small, no nucleus, have few organelles
Ex: bacteria

4. B. eukaryotic cells – have a nucleus and organelles that carry out specific functions in the cell
Ex: plant, animal, fungi cells

5. CFU What are two differences between prokaryotic and eukaryotic cells?
Give an example of each type of cell.

6. Cell History
A – Robert Hooke observes cork and uses the term “cell”

7. 1674 – Anton van Leeuwenhoek – makes a single lens microscope

8. 1838 – Matthias Schleiden – all plants are made of cells
1839 – Theodor Schwann – all living things are made of cells

9. Cell Theory A. Cells are the basic unit of life.
B. All organisms are made of one or more cells.
C. All cells come from existing cells.

10. Levels of Organization Multicellular Organisms
Organism Organ System Organ Tissue Cell

11. Tissue-group of similar cells that perform a particular function.
Organ-groups of tissues working together.

12. Plant Cells vs. Animal Cells
Plant Cells Animal Cells

13. Animal and Plant Cells

14. CFU Place the following terms in order from simplest to most complex:
organ, cell, organism, organ system, tissue