Lesson: Cells. Science Differentiation in action All living things are made up of cells. Your body has about 100 million million cells.

Lesson: Cells

Science Differentiation in action

All living things are made up of cells.Your body has about 100 million million cells.


Cells are very small.

We use a microscope to look at cells.


Coarse focus

Fine focus

Objective lens

Stage

Light

Eyepiece

Parts of a microscope


Coarse focus

Fine focus

Objective lens

Stage

Light

Eyepiece

Click to discover the function of each labelled part.

To magnify the image

To find an image

To find a clear image

To illuminate image

To focus on image

To hold slide


Coarse focus

Fine focus

Objective lens

Stage

Light

Eyepiece

Can you find these parts on your own microscope?


Using the microscope to look at onion cells.

What do you need for this experiment?


A plant cell

cell wall

cell membrane

nucleus

vacuole

chloroplast cytoplasm


An animal cell

cell membrane

nucleus

small vacuole

cytoplasm


What parts do plant cells and animal cells have in common?

cell membrane

cytoplasm

nucleus


cell wall

large vacuole

chloroplast

What parts do plant cells and animal cells NOT have in common?


What is the function of each part?

cell membrane

cytoplasm

nucleus

Controls what enters and leaves the cell

Holds cell contents

Controls the activities of the cell


What is the function of each part?

cell wall

large vacuole

chloroplast

Provides support

Stores food

Makes food


A

F

E

B

D

Label each part in the diagram.

Review Question

C


Why do animal cells not have a (i) cell wall or (ii) chloroplasts?

Question to think about

cell wall

chloroplast

Lesson: Cells. Science Differentiation in action All living things are made up of cells. Your body has about 100 million million cells.

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