Topic: Cells
Aim: Identify the 2 types of cells. Describe how
living things are organized.
Do Now: Take out Two types of Cells ISA for me
to check.
HW: Respiration Reading Notes due Monday!
Atoms project due Monday!
Explain the meaning of the term membrane-bound
organelle?
Enclosed by a membrane
endoplasmic reticulum
nucleus
vacuole
ribosome
mitochondria
Identify the two types of cells you
read about in your ISA.
Prokaryotic cells
Eukaryotic cells
Greek meaning of Probefore
Prognosis:
prediction about how something
will develop
Greek meaning of Euwell or good
Eulogy:
Words of praise for the deceased
Greek meaning of -karyo
nut or kernel
In biological terms:
nucleus
Prokaryote  “before nucleus”
Eukaryote  “good nucleus”
2 types of cells
1.PROKARYOTIC CELL:
1.Does a
prokaryotic
cell have a
nucleus?
2.Does it have
membranebound
organelles?
3.Does it have
ribosomes?
• NO NUCLEUS
• DNA in cytoplasm
• No membranebound organelles
• Ex: bacteria
Anthrax
Strep
Cholera
Did you know…
• Bacterial infections can be treated
with antibiotics.
Strep
E. coli
2.EUKARYOTIC CELLS:
1.Does a
eukaryotic
cell have a
nucleus?
2.Does it have
membranebound
organelles?
3.Does it have
ribosomes?
• HAVE A NUCLEUS
• Larger
• Contain membrane-bound organelles
Unicellular
organisms
Multicellular
organisms
What kind of cells make up a
multicellular organism?
• SPECIALIZED cells
(have specific jobs)
Levels of Organization
Can you place these terms in the
proper sequence from LEAST
COMPLEX to MOST COMPLEX?
Tissues
Organ systems
Cells
Organism
Organs
Levels of organization
Muscle cell
Cells
Smooth muscle tissue
Tissues
Stomach
Digestive system
Organs
System
Organism
1. Cells: specialized
•Examples:
–Red blood cells carry oxygen.
–Muscle cells help you
move.
Did you know…
• The longest living cells in the body are
brain cells which can live an entire
lifetime.
2. Tissue: group of similar
cells that perform a specific
function
Blood cells  blood tissue
Muscle cells  muscle
tissue  movement
3. Organ: many tissues working
together
Heart =organ made of
muscle, nerve & blood tissue
4. Organ system: group of organs
working together to perform a
specific function
Skeletal & Muscular Systems
Circulatory System
5. Organism: a combination of
organ systems that work
together
Let’s summarize…
1. Describe the difference between prokaryotic
and eukaryotic cells.
2. Describe the difference between unicellular
and multicellular organisms.
3. Identify the type of cells that make up a
multicellular organism.
4. Explain the organization of an organism.
Which of the following is a primary
difference between prokaryotic and
eukaryotic cells?
(1) Prokaryotic contain a membrane-bound
nucleus.
(2) Prokaryotic contain DNA.
(3) Eukaryotic cells contain a membrane
bound nucleus.
(4) Eukaryotic contain DNA.
Which sequence represents the correct order of
levels of organization found in a complex
organism?
(1) Cells  organelles  organs  organ systems 
tissues
(2) Tissues  organs  organ systems  organelles
 cells
(3) organelles  cells  tissues  organs  organ
systems
(4) organs  organ systems  cells  tissues 
organelles
These groups of cells represent different
(1) tissues in which similar cells function together
(2) organs that help to carry out a specific life activity
(3) systems that are responsible for a specific life
activity
(4) organelles that carry out different functions.
Which statement best compares a multicellular
organism to a unicellular organism?
(1) A multicellular organism has organ systems that
interact to carry out life functions, while a singlecelled organism carries out life functions without
using organ systems.
(2) A single-celled organism carries out fewer life
functions than each cell of a multicellular
organism.
(3) A multicellular organism always obtains energy
through a process that is different from that used
by a single-celled organism.
(4) The cell of a single-celled organism is always
much larger than an individual cell of a
multicellular organism.
Review:
Put the following terms in order from
least complex to most complex:
Tissue
Organism
Cell
System
Organ
Organelle
3
7
4
8
2
5
6
1
8
7
E
1.PROKARYOTIC CELL:
http://www.youtube.com/watch?v=IYe5tHaEXRE
Review:
1. Which statement describing the cells in a body
system is correct?
(1) Each cell in the system is identical to the other cells in
the system, and each cell works independently of the
other cells.
(2) Some cells in the system may be different from the
other cells in the system, but all cells are coordinated
and work together.
(3) Each cell in the system is different from the other
cells in the system, and each cell works independently
of the other cells.
(4) All cells in the system are identical to each other and
work together.
2. Which of the following is a primary
difference between prokaryotic and
eukaryotic cells?
(1) Prokaryotic contain a membrane-bound
nucleus.
(2) Prokaryotic contain DNA.
(3) Eukaryotic cells contain a membrane
bound nucleus.
(4) Eukaryotic contain DNA.
3. Which sequence represents the correct order of
levels of organization found in a complex
organism?
(1) Cells  organelles  organs  organ systems 
tissues
(2) Tissues  organs  organ systems  organelles
 cells
(3) organelles  cells  tissues  organs  organ
systems
(4) organs  organ systems  cells  tissues 
organelles
4. These groups of cells represent different
(1) tissues in which similar cells function together
(2) organs that help to carry out a specific life activity
(3) systems that are responsible for a specific life activity
(4) organelles that carry out different functions.
6. Which statement best compares a multicellular
organism to a unicellular organism?
(1) A multicellular organism has organ systems that
interact to carry out life functions, while a singlecelled organism carries out life functions without
using organ systems.
(2) A single-celled organism carries out fewer life
functions than each cell of a multicellular organism.
(3) A multicellular organism always obtains energy
through a process that is different from that used by
a single-celled organism.
(4) The cell of a single-celled organism is always much
larger than an individual cell of a multicellular
organism.
1. What do prokaryotic cells contain?
2. What is a cell organelle found in a
eukaryotic cell and not in a
prokaryotic cell?
3. Explain the difference between a
unicellular and multicellular
organism.
Put these structures in the correct
order from least complex (simple)
to most complex:
Tissues
Systems
Cells
Organs
Organelles
http://www.youtube.com/watch?v=X6N82No
4Nz8
http://www.youtube.com/watch?v=tPulEAryP
O0
http://www.youtube.com/watch?v=N5KFVAJ
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