1. What’s Inside a Cell?

2. Animal Cells
• Found in every living animal.
• Gives the animal its STRUCTURE and
lets the animal FUNCTION.
• Can be SPECIALIZED to do certain jobs.
• Can be different sizes and shapes.

3. What are organelles?
• Tiny structures inside a cell.
• They carry out specific jobs within the cell.
• Kind of like organs for a cell.

4. CELL MEMBRANE
• The cell membrane is the outer doors of
the cell. It forms the outer boundary that
separates the cell from its surroundings.
FUNCTIONS:
• It lets things in and out of the cell (like
doors).
• It holds everything together.

5. CYTOPLASM
• A jelly-like fluid that contains all of the
organelles of the cell. It is surrounded by
the Cell Membrane.
FUNCTIONS:
• Holds all the organelles inside of the cell in
a moving fluid.

6. CYTOPLASM
CELL MEMBRANE

7. NUCLEUS
• The “brains” or control center of the cell. It
is a large oval structure.
FUNCTIONS:
• Produces proteins to control all of the
cell’s activities

8. Nucleus
Rough ER

9. Nucleolus
• A small oval structure in the Nucleus that
makes Ribosomes.
FUNCTIONS:
• To make Ribosomes.

10. NUCLEUS = the whole peach
NUCLEOLUS = the pit

11. VACUOLES
• Large water-filled sacs floating in the
Cytoplasm. Like storage areas for the
cell. Not found in all animal cells. Some
cells have more than one.
FUNCTIONS:
• Store food and other materials needed by
the cell.

12. VACUOLE

13. MITOCHONDRIA
• Rod-shaped structures found in the
Cytoplasm. Known as the “powerhouses”
or batteries of the cell.
FUNCTIONS:
• They convert food energy into energy the
other organelles use to do their job.

14. MITOCHONDRIA

15. ENDOPLASMIC RETICULUM (ER)
• A maze of passageways in the Cytoplasm.
TWO KINDS OF ER IN ANIMAL CELLS:
1. Rough ER – Have Ribosomes attached
2. Smooth ER – No Ribosomes attached
FUNCTIONS:
• To carry proteins and other materials from one
part of the cell to other parts.
• Many of the cell’s chemical reactions occur
here.

16. ENDOPLASMIC RETICULUMROUGHER
SMOOTHER

18. LYSOSOMES
• Small round structures found in the Cytoplasm.
They contain digestive enzymes. They are like
the clean-up crew.
FUNCTIONS:
• They break down materials with their digestive
enzymes.
• Break down large food particles into smaller
ones.
• Break down old cell parts and recycle
• them.

19. LYSOSOMES
Chemicals

20. RIBOSOMES
• Small grain-like bodies found on the
Rough ER and floating around the
Cytoplasm. They are like protein
factories. There are more ribosomes in a
cell that any other organelle.
FUNCTIONS:
• They make Proteins

21. A Whole Ribosome

22. GOLGI COMPLEX
• Flattened sacs and tubes found in the
Cytoplasm. Like the cell’s mail room.
FUNCTIONS:
• Receives proteins from other Smooth ER.
• Packages the proteins up.
• Sends them to other parts of the cell.

23. GOLGI
COMPLEX

24. Cytoskeleton
• A web of protein in the cytoplasm
FUNCTION:
• Acts as a muscle and a skeleton
• Keeps the membrane from collapsing
• Helps some cells move

25. CELL WALL
• The outermost organelle of a cell (in plant
cells) that is made of cellulose (a sugar)
FUNCTION:
• Allow plants to stand upright
• Some take in water

26. Chloroplast
• A green organelle in plant cells made of
two membranes and contain their own
DNA
FUNCTION:
• Where photosynthesis takes place

27. ORGANELLES IN AN ANIMAL
CELL