Year 8 Cells - For additional resources visit: http://www.iheartscience.net

1. Cells
Sarah Jones
http://biocanvas.net/post/15425333371/the-hippocampus-of-a-mouse-stained-with-the

2. The Discovery of Cells
In the seventeenth century, Robert Hooke looked
at thin slices of cork under a microscope that he
had made from lenses. He observed small box-like
shapes inside the cork. He called the little boxes
that he saw cells.
en.wikipedia.org

3. http://discovermagazine.com/2015/june/21-leeuwenhoeks-lucky-break

4. Electron Microscopy Images Of Coffee
coffeeguru4iphone.wordpress.com

5. boneresearchsociety.org
SEM Image of Trabecular bone

8. Under the five kingdom system cells can be
divided into two basic types.

9. Prokaryotic cells - simple cells without
distinct membrane bound organelles or nucleus.

10. Eukaryotic cells - more complex with
membrane bound organelles and nucleus.

11. Animal Cell

12. • Exist as part of a multicellular organism.
• Specialisation of cells into many types (cell
differentiation).
• Possess nucleus and membrane bound
organelles.

15. Plant Cell
en.wikipedia.org

16. • Exist as part of a multicellular organism.
• Specialisation of cells into many types (cell
differentiation).
• Possess nucleus and membrane bound
organelles.

18. Plant vs Animal
Plant and animal cells have many similarities
because they are both eukaryotic.
They also have some differences:

19. Parts of a Generalised Animal Cell
https://en.wikipedia.org/wiki/Cell_nucleus

20. • Contains the chromosomes (genetic
information) for the cell.
• Controls the activities of the cell.
Nucleus

21. • Double membrane - outer membrane and
inner membrane.
• Inner membrane is folded forming cristae.
• The interior contains an organic matrix
containing chemical compounds.
• Site of aerobic respiration.
Mitochondria

22. Rough Endoplasmic Reticulum
• A membrane system of flattened parallel
cavities which are interconnected and covered
with ribosomes.
• An intracellular transport system.

23. Golgi Apparatus
• Consists of a stack of flattened cavities which
package substances produced by the cell into
vesicles.
• These vesicles can fuse with the cell
membrane (exocytosis) or become lysosomes
(digestive vesicles).

24. Plant Cell Walls
• The main component of plant cell walls is
cellulose.
• Cellulose molecules are arranged in bundles
called microfibrils.
• The function of the plant cell wall is to provide
strength and support the plant.

25. Prokaryotic organisms are commonly called
bacteria.
They are cells with a simple structure.
They have no membrane around the nucleus
and lack any membrane bound organelles.

26. Blue-green bacteria make their own food by
photosynthesis.

27. Cell Division