2. Definition of Cells
• Cells are the basic building blocks of living
organisms
–Just like brick can be a building block of a
house
3. Definition of Cells
• Cells are so small you cannot see them with
your naked eye
–you need a microscope
4. Purpose of Cells
• The main purpose of a cell
is to organize
–Cells hold different pieces
and each cell has a different
set of jobs
–Cells are small
compartments that hold all of
the biological equipment
necessary to keep an
organism alive and successful
on Earth
6. Types of Cells
• There are many types of cells
–They can have different shapes and sizes
Smallest Cells: Longest Cells: Biggest Cells:
6 inches long, 5 inches wide, 3 pounds
Ostrich Egg
7. Types of Cells
• There are many types of cells
–We will discuss animal cells and plants cells
8. Animal Cells
• Animal cells are eukaryotic (it means they
have a nucleus)
10. Cell Parts
• Nucleus: controls the cell
–It helps control eating, movement, and
reproduction just like a brain in animals
–The nucleus is not always in the center of the
cell, but you won't find it near the edge of a cell
because it's dangerous
11. Cell Parts
• Mitochondrion: gives the cell energy
–converts energy stored in food into usable
energy for work
12. Cell Parts
• Vacuole: contains the waste or trash
13. Cell Parts
• Ribosomes: makes the proteins for the cell
14. Cell Parts
• Golgi Apparatus: packs protein
–it receives, processes, packages, and ships
protein
15. Cell Parts
• Cytoplasm: jelly-like fluid that holds the cell
in place
–contains salts, minerals and organic molecules
–surrounds the other parts
16. Cell Parts
• Cell Membrane: the structure that separates
the inside of the cell from the outside of the
cell
17. Cell Parts
• Lysosome: purpose is to digest things
–breaks down food particles, invading objects,
or worn out cell parts
18. Plant Cells
• Plant cells are eukaryotic (it means they have
a nucleus)
20. Cell Parts
• Cell Wall: purpose is to help the plant keep
its shape
–It's like taking a water balloon and putting it in
a cardboard box. The balloon is protected from the
outside world.
21. Cell Parts
• Chloroplast: are the food producers of the
cell
–they create sugars that the plant uses
22. Comparing Animal and Plant Cells
• Look closely at the similarities and
differences between an animal cell and a
plant cell