Transcript Looking Inside Cells - Broom & Brown's 7th Grade Science

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
Check out these music videos
•
• http://www.youtube.com/watch?v=zafJKbMPA8
•
• http://www.youtube.com/watch?NR=1&v=r
ABKB5aS2Zg