1. All About Cells

2. Cells Answer these questions in your notebook:
- What is the most important organelle? Why?
- How big is a cell?
- Why do we need cells?

3. Cells What even are cells? Cells are the smallest unit of life.
When multiple cells come together, it forms tissues.
Tissues are what make up our entire body.
Our organs are made up of tissues. Therefore, our body
needs cells to maintain its structure.
Humans have around 37.2 TRILLION cells.

4. Cells Different types of cells have different functions.
A muscle cell is made to be used inside of a muscle. There are many different types of cells.

5. Cells

6. Cells Here is an image of animal cells.
It can only be seen through a microscope.

7. Cells Nucleus Cytoplasm Cell Membrane

8. Cells
This is a microscopic view of muscle cells. What do you think Those purple ovals are?

9. Cells This is a microscopic view of plant cells.
What do we know about how plant cells are different than animal cells? Can you see any of those differences in this picture?

10. Cells

11. Cells
We know there are two different types of organisms: Unicellular and Multicellular.
Multicellular organisms have many cells.
Unicellular organisms have only one cell.
What might a unicellular organism look like? What would a multicellular organism look like?

12. Cells Examples of multicellular organisms include…. Sea Otters Birds
Trees
Fly
And Us!
Mushrooms

13. Cells Examples of unicellular organisms include: Plankton Amoeba
Bacteria

14. Cells
MOST types of unicellular organisms are so small that they are called ‘microorganisms.’
But what is the largest type of unicellular organism? Can you guess?

15. Cells It's called Caulerpa- a type of a seaweed.

16. Cells
We know that there are many more unicellular organisms than multicellular. Why is this?
We also know that cells replicate themselves. New cells come from older cells.
Unicellular organisms multiply very, very quickly. Groups of unicellular organisms can double their population in only 30 minutes.
Why is this? Why might Unicellular organisms multiply so quickly? Think about everything we discussed in this powerpoint. Answer the question in your notebook.

17. Cells
Cells may be small- but they can still be beautiful works of art...

24. Cells
Many parts of the human body look fascinating when viewed under a microscope, for example...

25. This is called a
Otolith, it is found in your ear and helps you keep your balance.

26. This is a close-up of
insulin, which is made in the pancreas.

27. This is a close-up picture of a tastebud, found on the tongue.

28. This is the inside of a healthy lung.