Looking Inside Cells

Organelles

• Organelles are the

structures/parts of

a cell and have a

specific job

Cell Wall

• The rigid outer layer of nonliving material that surrounds plant cells is the cell wall.

• Only found in plant cells.

• Supports & protects

Cell Membrane

• Found in plant cells & animal cells

• Very thin

• Job – to control what comes in and what goes out.

Cell Membrane

Plant cell Animal cell

Cytoplasm

• A clear jelly like substance that keeps all of the organelles from bumping into one another… think of clear jello

Cytoplasm

The organelles are inside the cytoplasm.

• Now, lets take a look at the organelles that are found inside cells.

• You have to have a microscope because they are so small.

Organelle: Nucleus

• Nucleus – the control center.

• The nucleus directs all activity in the cell. It also controls the growth and reproduction of the cell.

• It is round.

Nucleus

Organelle: Mitochondria

• The mitochondria makes the energy for the cell (like a power plant) … so it can dance

• It is oblong shaped.

Mitochondria

Organelle: Ribosomes

• Ribosomes act like little factories to produce protein.

• They pass protein into the endoplasmic reticulum. Some are found floating in cytoplasm.

Ribosomes

Organelle: Endoplasmic Reticulum

• The Endoplasmic Reticulum are maze passageways in the cytoplasm.

• They carry proteins from one part of the cell to another.

• This is very important for the cell to get its protein that it needs. This is like a conveyor belt.

Endoplasmic Reticulum

Found close to nucleus

It carries proteins( which are made by the ribosomes)…the dots

Organelle: Golgi Bodies

• Golgi bodies act like a post office. They package stuff up and send it to other parts of the cell.

Golgi Bodies

Organelle: Vacuoles

• Vaculoes are large storage buildings.

• Because they help store food, the plant’s vacuole is much larger than the animal’s vacuole.

Vacuole

Organelle: Lysosomes

• They are the clean-up crew.• They have chemicals in them that digest the

wastes and other bad organelles.

• When the cell dies the lysosmes work swiftly with their chemicals and digest the dead cell.

• Without lysosomes living organisms would become filled with dead cells.

Lysosomes

Organelle: Chloroplast

• Chloroplast is only found in plants.

• It contains a green pigment called chlorophyll.

• They are necessary for

plants to make their

own food. They capture

the sunlight energy.

Chloroplast

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