1. Investigating cells

2. Today we are going to..
Consolidate our knowledge on the parts of animal and plant cells and their function
Revise Specialised cells in both plants and animals
Label the microscope
Practise working out the “total magnification” of a microscope
Discuss why we need to use stains

3. ANIMAL CELL

4. PLANT CELL

5. Specialised Animal cells

6. Red Blood Cells

7. White Blood Cells

8. Cilliated Epithelial cell

9. Goblet Cell

10. Motor Neurone

11. Specialised plant cells

12. Guard cells

13. Mesophyll

14. Root Hair Cell

15. Labelling the microscope

17. Magnification
Each lens (eyepiece lens and objective lenses) on the microscope has different strength of magnification
Total magnification = eyepiece lens x objective lens

18. An example:
The eyepiece lens has a magnification of x10 and the objective lens a magnification of x40 Total magnification= eyepiece lens x objective lens = 10 x 40 The total magnification is…

19. SHOW ME BOARDS

20. Calculate The eyepiece lens = x10 The objective lens = x35
The total magnification =

21. Calculate The eyepiece lens = x20 The objective lens = x30
The total magnification =

22. Calculate The eyepiece lens = x15 The objective lens = x40
The total magnification =

23. Calculate The eyepiece lens = x10 The objective lens = x65
The total magnification =

24. Calculate The eyepiece lens = x15 The objective lens = x200
The total magnification =

25. Stains..
In order to see cells clearly under the microscope we must STAIN the sample.
These STAINS allow us to view the internal structures (ORGANELLES) of cells
Crystal violet, methylene blue and iodine are examples of stains

26. Cells stained with methylene blue

27. Cells stained with crystal violet

28. Cells Stained with Iodine