1. Cells A Characteristic of All Living Things
Non-Living
Family: flickr.com/photos/afroswede/ ; Other images provided by Science: A Closer Look (Maryland), pages 28 and 30 (MacMillan/McGraw-Hill, 2008)

2. Generally Accepted Characteristics of All Living Things
They reproduce (parents and offspring)
They grow and develop (life cycles)
They obtain and use energy (eat or make their own food)
They respond to their environment (move)
AND
Are made of one or more units called …
CELLS

3. Cells of Multicellular Organisms
Animal Cells
Plant Cells
Images provided by Science: A Closer Look (Maryland), pages 28 and 30 (MacMillan/McGraw-Hill, 2008)

4. Cells All living things are made of cells.
Multicellular organisms are made of different types of cells.
Different types of cells look different and do different things.
Specialized cells group together to form a tissue and to perform a specific function (i.e., potato cells form potatoes and muscle cells form muscles)

5. Levels of Organization
Images provided by and Science: A Closer Look (Maryland), Toolkit CD and page 30 (MacMillan/McGraw-Hill, 2008)
Levels of Organization
Cells: The basic building block.
Tissues: Cells that work together to perform a function.
Organs: Tissues that work together to perform a function.
Organ System: Organs that work together to perform a function.

6. Images provided by Science: A Closer Look (Maryland), Toolkit CD and page 30 (MacMillan/McGraw-Hill, 2008)
Chloroplasts with chlorophyll
Wall
Membrane
Plant Cells
Plant cells have a cell membrane and a more regular shape due to a stiff cell wall. They have chloroplasts with chlorophyll to help plants make their own food.

7. Plant Cell Example Pine Needle Cells
Copyright CNAP, University of York;
Cross Section of Pine Cells

8. Plant Cell Example Potato Cells

9. Plant Cell Example Onion Cells

10. Plant Cell Example Elodea Cells

11. Images provided by Science: A Closer Look (Maryland), Toolkit CD and page 28 (MacMillan/McGraw-Hill, 2008)
Animal Cells
The cells of humans and other animals have a cell membrane, but they do not have a stiff cell wall. They cannot make their own food and do not have chloroplasts. However, there is a greater variety to their shapes.

12. Animal Cell Example Blood Cells
White Blood Cell
Red Blood Cell
Platelet
Red Blood Cells

13. Muscle cells must stretch and grow.

14. Nerve cells send signals to the brain from the body.
Smi32neuron http//:brainmaps.org

15. Skin (Epithelial) Cell cover the body in a thin layer
Skin (Epithelial) Cell cover the body in a thin layer. They regenerate quickly.

16. Brain Cells http://en.wikipedia.org/wiki/Image:Brain_090407.jpg

17. Animal or Plant Cell? Plant Cell: Elodea
Plant Cell: Elodea

18. Animal or Plant Cell? Animal Cell: Nerve
Animal Cell: Nerve

19. Animal or Plant Cell? Plant Cell: Spirogyra
Plant Cell: Spirogyra

20. Animal or Plant Cell? Animal Cell: Muscle
Permission granted by Rhodes EMU at
Animal Cell: Muscle

21. Animal or Plant Cell? Plant Cell: Potato
Hedges, Kathryn.
Plant Cell: Potato

22. Animal or Plant Cell? Plant Cell: Onion
Hedges, Kathryn. <
Plant Cell: Onion

23. Animal or Plant Cell? Animal Cell: Kidney
Animal Cell: Kidney

24. Cell Review All living things are made of cells.
Multicellular organisms are made of different types of cells.
Different types of cells look different and do different things.
Specialized cells group together to form a tissue and to perform a specific function (i.e., potato cells form potatoes and muscle cells form muscles)