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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Presentation transcript:

Lesson: Cells

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

Science Differentiation in action Cells are very small. We use a microscope to look at cells.

Science Differentiation in action Coarse focus Fine focus Objective lens Stage Light Eyepiece Parts of a microscope

Science Differentiation in action 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

Science Differentiation in action Coarse focus Fine focus Objective lens Stage Light Eyepiece Can you find these parts on your own microscope?

Science Differentiation in action Using the microscope to look at onion cells. What do you need for this experiment?

Science Differentiation in action A plant cell cell wall cell membrane nucleus vacuole chloroplast cytoplasm

Science Differentiation in action An animal cell cell membrane nucleus small vacuole cytoplasm

Science Differentiation in action What parts do plant cells and animal cells have in common? cell membrane cytoplasm nucleus

Science Differentiation in action cell wall large vacuole chloroplast What parts do plant cells and animal cells NOT have in common?

Science Differentiation in action 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

Science Differentiation in action What is the function of each part? cell wall large vacuole chloroplast Provides support Stores food Makes food

Science Differentiation in action A F E B D Label each part in the diagram. Review Question C

Science Differentiation in action Why do animal cells not have a (i) cell wall or (ii) chloroplasts? Question to think about cell wall chloroplast