Download Cell Organelles

Eukaryotic Cell Organelles
Structure & Function
It’s a small, small,
world…
The Big Picture
All Different Shapes and
Sizes!

Eukaryotic cells are everywhere!
Cytoplasm

Comprised of the cell organelles

Semi-fluid: 70-90% water
Found all over the cell
 Contained by the cell membrane

Ribosomes
Site of protein synthesis
 Can either be free in cytoplasm or
attached to rough endoplasmic reticulum

Rough Endoplasmic Reticulum
Makes and transports proteins
 Covered with ribosomes (therefore rough
ER)

Smooth Endoplasmic Reticulum
Numerous functions including synthesis
of lipids and steroids
 Lacks ribosomes

Golgi Apparatus
Consists of closely layered stacks of
membranes
 Modifies, stores, and ships products of
the Endoplasmic reticulum (proteins)

Lysosome
Digestive organelle in eukaryotic cells
 Defend a cell from invading bacteria and
viruses and break down damaged or
worn out cell parts

Centrioles

Found in animal cells  Involved in cell
division
 Composed of
microtubules
 Used to pull
chromosomes apart
Central Vacuole
A fluid filled sac used for storage of
materials needed by the cell
 Helps with cellular digestion
 In plant cells the vacuole usually stores
water and ions that are needed in the
cell

Cell Wall
Found in plant cells
 Provides protection
for plant cells
 Helps maintain cell
shape

“The Colorful” Chloroplast

Found in plant cells
(not animal)

Allows plants to
produce food through
the process of
photosynthesis
“The Colorful” Chloroplast

Contains the pigment chlorophyll


This is what gives plants their green color
Contains a double membrane
“The Mighty” Mitochondria

Supply ENERGY to
the cell

They are bean
shaped and have two
membranes
“The Mighty” Mitochondria

Purpose of these two
membranes is for an
increased surface area.

This helps in the
production of ATP

Mitochondria have their
own ribosomes and
DNA!
Cell Membrane

Cells of all organisms are surrounded by
a cell membrane. It is a thin layer of lipid
and protein that separates the cells
contents from its environment
Cell Membrane

Function: Controls what enters and exits
the cell (the gatekeeper)
Nucleus

Contains most of the
cell’s genetic material

Control center for the cell

Surrounded by a double
membrane called an
nuclear envelope
Nucleus

Contains a nucleolus: a
specialized organelle in
the nucleus of cells; the
site of ribosome
production.
Cytoskeleton
Fibers that provide structural support for
the cell
 Helps the cell move
