Investigating cells.

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Presentation transcript:

Investigating cells

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

ANIMAL CELL

PLANT CELL

Specialised Animal cells

Red Blood Cells

White Blood Cells

Cilliated Epithelial cell

Goblet Cell

Motor Neurone

Specialised plant cells

Guard cells

Mesophyll

Root Hair Cell

Labelling the microscope

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

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…

SHOW ME BOARDS

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

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

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

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

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

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

Cells stained with methylene blue

Cells stained with crystal violet

Cells Stained with Iodine