1. B2 Cell Specialisation
BTEC NQF L3 Unit 1

2. Starter Activity
In your pair, discuss the structures found in a typical animal cell and their functions
Discuss the structures found in a typical plant cell and their functions
Name three other types of cell that you have studied so far

3. Think, Pair, Share What is a unicellular organism?
What is a multicellular organism?
Give two examples of each

4. Unicellular organisms
Paramecium
Euglena
Yeast
Amoeba
Bacteria

5. Multicellular organisms

6. Multicellular organisms
Multicellular organisms are made up of more than one cell.
These cells can be organised into tissues and organs.

7. What do all of these cells have in common?

8. Cell specialisations
The cells on the previous slide all have typical structures such as:
cytoplasm
cell membrane
cell wall
nucleus
chloroplasts
However, the structure each type of cell is different so that it can carry out a particular function.

9. What is a specialised cell?
Plants and animals consist of many cells and so are known as multicellular.
They contain many different types of cell.
Each type of cell is designed to carry out a particular job or function.
This is known as cell specialisation.

10. Did You Know?
There are over 100 different types of cell in the human body!
These are just a few examples………..

11. Head contains nucleus and mitochondria
Sperm cell
Head contains nucleus and mitochondria
Tail
Sperm cells swim towards the egg to carry out fertilisation. They have a tail to enable them to swim and many mitochondia for producing energy.
Twig: Sperm cell

12. Egg cell (ovum) Made in the ovaries of mammals.
Cytoplasm containing food store
Made in the ovaries of mammals.
An egg cell is large compared to sperm.
Contains a food store in the cytoplasm for nourishing the embryo.
Nucleus
Twig: Egg cell

13. Ciliated cell nucleus Help to prevent dust and bacteria entering lungs
Line the windpipe (trachea)
Have tiny hairs called cilia
Cilia sweep mucus with trapped dust and bacteria up to mouth to be swallowed
cilia

14. Nerve cell (neurone) Longest cells in the body
extension of the cytoplasm (axon)
nucleus
Longest cells in the body
Transmit electrical nerve impulses in body
Twig: Nerve cell

15. Red blood cell No nucleus
Contain haemoglobin to carry oxygen around the body
“Biconcave” shape for large surface area
Twig: Blood

16. Palisade mesophyll cell
Found in leaves of plants
Packed with chloroplasts to trap light for photosynthesis
nucleus
chloroplasts

17. Root hair cell
Root hair increases surface area for uptake of water and minerals from soil
Thin cell wall so water can move in easily
thin cell wall
root hair
cell membrane
vacuole

18. Cell Specialisations Task
Your teacher will provide a worksheet for this task
Use your knowledge of cells to name each cell in the worksheet
Write how the structure of each cell allows it to carry out a particular function

19. Cell Specialisations Task
Check your work using the table opposite
You may have remembered additional information!