2. Introduction Cells are the basic units of organisms
Cells can only be observed under microscope
Two basic types of cells:
Animal Cell
Plant Cell

3. Plant Cell

4. Different kinds of plant cells
Onion Epidermal Cells
Root Hair Cell
root hair
Guard Cells

5. Animal Cell

6. Different kinds of animal cells
white blood cell
red blood cell
cheek cells
sperm
nerve cell
muscle cell
Amoeba
Paramecium

7. Similarities between plant cells and animal cells
Both have a cell membrane surrounding the cytoplasm
Both have a nucleus
Both contain mitochondria
Both contain ribosomes
Both contain golgi bodies
Both contain rough and smooth ER

8. Differences between plant cells and animal cells
Relatively smaller in size
Relatively larger in size
Irregular shape – no cell wall
Regular shape – cell wall present
No chloroplast
Chloroplast for photosynthesis
Small or no vacuole
Large central vacuole

9. All about cells

10. Principles of Cell Theory
All living things are made of cells
Smallest living unit of structure and function of all organisms is the cell

11. Prokaryotic Cells First cell type on earth
Cell type of Bacteria and Archaea

12. Prokaryotic Cells No membrane bound nucleus
Nucleoid = region of DNA concentration
Organelles not bound by membranes

13. Eukaryotic Cells Nucleus bound by membrane
Include fungi, protists, plant, and animal cells
Possess many organelles
Protozoan

14. Cellular Respiration
Occurs in the mitochondria to create energy for the cells
Uses oxygen to break down sugar (glucose)
All cells need oxygen and glucose
The cells must then excrete (remove) carbon dioxide and water

15. Unicellular vs multicellular organisms

16. Did you know???
Both plants and animals can be made of one cell-or millions of cells like you.
Single-celled (unicellular) organisms, however, tend to be different from those with many cells.
Some single-celled creatures have a nucleus, and some do not.
Some single-celled plants have chloroplasts, but not all have stiff cell walls.
All single-celled organisms eat, get rid of wastes, and reproduce.

17. Single-Celled Organisms
Made of only one cell
Amoebas, Algae, Plankton, paramecium, bacteria
You need a microscope to see single-celled organisms.

18. Multicellular Organisms
Living things made up of more than one cell
You are a multicellular organism.
Can you think of any other multi-celled organisms?

19. Multicellular Organisms
Have a higher degree of specialization
Cells work together and function to create a living organism
Example: a human – starts as a single cell. Then organize themselves into three groups called germ layers. One layer will form the skin and nerves, Another layer becomes the lining of the digestive tract. The third layer produces all other body parts.

20. Single-Celled BOTH Multi-Celled