1. W Richards Worthing High School
22/09/2018
Cells
W Richards
Worthing High School
Please note – some of the animation effects used here only work in PP XP

2. Using a microscope 1. Eyepiece 2. Arm 7. Lenses 6. Stage
22/09/2018
1. Eyepiece
2. Arm
7. Lenses
6. Stage
3. Focus adjustor
5. Mirror
4. Base

3. Plant cells vs. Animal cells
22/09/2018
Only plant cells have these:
Both types of cell have these: 4) 1) 5) 6) 2) 3)
Cell wall – provides support
Cytoplasm - this is where the reactions happen
Nucleus – The “brain” of the cell
Chloroplasts – contain chlorophyll
Cell Membrane – holds the cell together
Large Vacuole – contains sap

4. Specialised cells
22/09/2018
Consider the root hair cell:
It is “suited” to its job of taking in water and nutrients in 2 ways:
It has a large surface area
It has a thin cell membrane
The sperm cell is another example of a specialised cell:
Strong tail for swimming
Vacuole containing enzymes

5. More specialised animal cells
22/09/2018
I.D:
Function:
Features:
Red Blood Cell
Carries oxygen around the body
No nucleus and large surface area
White blood cell
Egg cell (ovum)
Ciliated epithelial cell
Nerve cell (neurone)

6. Cells, tissues, organs and systems
22/09/2018
Basically, all living things are made up of cells…
A group of CELLS makes up a TISSUE
A group of TISSUES makes up an ORGAN
A group of ORGANS makes up a SYSTEM
A group of SYSTEMS make up an ORGANISM

7. Here’s another example in humans:
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Here’s another example in humans:
Muscle cells
Muscle tissue
Organ
System
Organism

8. Cell growth
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Animal cells:
Plant cells:

9. Plant reproduction For a plant to reproduce two stages must happen:
22/09/2018
For a plant to reproduce two stages must happen:
Stage 1: Pollination – pollen from one plant is taken to another by insects or the wind:

10. Plant reproduction
22/09/2018
Stage 2: Fertilisation – a pollen tube grows down through the style and the pollen grain (which contains the male sex cell) travels down the tube to fertilise the female egg cell:
Ovaries