1. Cells

2. Cell
is the basic building block that makes up all living things

3. Take in food to store energy Get rid of body wastes
Cell Functions
Take in food to store energy
Get rid of body wastes
Make new cells for growth
Release energy
Respond to the environment

4. Plant Cell cell membrane chloroplasts cell wall vacuole mitochondria
cytoplasm
nucleus

5. Animal Cell
VACUOLE
MITOCHONDRIA
NUCLEUS
Cell MEMBRANE
CYTOPLASM

6. Cell Parts and Functions

7. Cell Membrane Surrounds the cell to help hold it together
Allows materials to move in and out
Works like a gate in a walled city

8. PICTURE OF A REAL CELL MEMBRANE
It has been magnified so that we can see it!

9. Nucleus
Contains the chromosomes (DNA) which determines the characteristics
Controls cell reproduction and other functions
Like a king controlling his city

10. Nucleus seen in a human cheek cell

11. Cytoplasm Found between the cell membrane and nucleus
Jellylike substance containing chemicals to keep the cell working
Like the space/air that fills the walled city

12. Mitochondria Releases energy from food
Like a power plant producing energy for the city

13. Vacuoles Used for storage Stores food, waste, or water
Like a water tower or a garbage dump for the city

14. Cell Wall (Plants Only)
Outside cell membrane
Rigid layer that supports and protects the plant cell
Like a wall surrounding the city

15. The cell walls of these onion skin cells can be seen in the photograph below.

16. Chloroplasts (Plants Only)
Makes food for the plant cell
Uses sun energy to make food (glucose) and oxygen
Like a restaurant or bakery in the city

17. An Elodea leaf magnified 400X
An Elodea leaf magnified 400X. The numerous green structures are chloroplasts.

19. Cell Membrane Cytoplasm Chloroplast Cell Wall Vacuole Mitochondria
The Parts of a Cell
Cell Membrane
Cytoplasm
Chloroplast
Cell Wall
Vacuole
Mitochondria
Nucleus

20. Cells have a limit to how big or small they can be.
The Size of Cells
Cells have a limit to how big or small they can be.
The head of a pin is about 2mm in diameter. A cell is even smaller. Nearly invisible without magnification, dust mites dwarf pollen grains and human cells. In turn, bacteria and viruses are even smaller.
How Big is a Cell?

21. Time to Review!

22. cell membrane surrounds cell-holds it together
allows materials to pass in & out of cell

23. basic building block that makes up all living things
cell
basic building block that makes up all living things

24. cytoplasm
between cell membrane & nucleus

25. chloroplast found in plant cells uses Sun’s energy to
make food (sugar) &
oxygen

26. cell wall found in plants outside the cell membrane
gives extra support &
protection

27. stores H20 & breaks down materials
vacuole
stores H20 & breaks down materials

28. produce energy by cellular respiration
mitochondria
produce energy by cellular respiration

29. cytoplasm

30. cell membrane

31. mitochondria

32. chloroplast

33. cell wall

34. vacuole

35. Cell Analogy Project
The skin on the Barbie doll is like the cell membrane of a cell because both are outside surfaces, and allow substances to pass in and out of the cell.

36. Edible Animal Cell cell membrane = plastic bag Jello = cytoplasm
2 raisins = mitochondria
1 pear = nucleus
2 peaches = vacuoles