DID YOU KNOW? Laser-printing organs!

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DID YOU KNOW?Laser-printing organs!

• http//www.youtube.com/watch?voAs0k2lQa4M

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Lets look back

• evolution of cells!

Unicellular eukaryotes clumped together to form
colonies.
First PROKARYOTES were very simple and oxygen was
lacking from the atmosphere so they lived in
water
First humans are thought to have evolved from the
Homo Genus
ENDOSYMBIOTIC THEORY large prokaryotes engulfed
smaller ones, which became organelles inside!
EUKARYOTES are formed
Spontaneous polymerization of atoms into
molecules and biomolecules
Multicellular organisms are formed and highly
complex with specialized parts
Beginning of Earth (atoms)
NOW
4.5billion 4billion 3.8billion
3billion 2billion 600million
500million 400million 200,000
Scientists are growing cells, mapping the human
genome and making organs from laser printers!
Membranes formed from lipids and nucleic acids
formed DNA/RNA
Fish and land-based plants (mosses) evolved
Prokaryotes became photosynthetic, producing
oxygen for the atmosphere and using oxygen for
efficient energy use
Insects and Trees
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Life is Cellular
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Who is on top of the food chain? Take a second
to think about it while you watch this clip
http//youtu.be/4XBvDx2Lhfs 
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• Those tiny, little, one-celled organismS known as
  bacteria can affect us in many different
  ways..
• Now, Who do you think is on top of the food
  chain?!

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• All living things are made of at least one cell.

The word CELL comes from the Latin word
cella meaning small room. It was coined by
Robert Hooke, who compared cork cells he saw in a
microscope to the small rooms monks lived in.
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What are CELLS?

• CELLS are microscopic building blocks that make
  up all living things.
• Just like monomers build into polymers, cells
  build into living organisms
• Everything that is alive has at least one cell!
• This guy has cells.
• Unicellular organisms!
• This cute puppy has cells, too!

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How many cells do humans have?

• Depending on the source, that figure varies from
  50 to 75 trillion cells!!
• Thats 75,000,000,000,000a whole lot of zeroes!

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Describe cellsin your own words.
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Uni vs. Multi

• Fill out the T-chart as we go through unicellular
  vs. multicellular organisms!

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Some things are UNIcellular.

• UNICELLULAR means one-celled.
• UNI one. (Like uno!)
• Bacteria are an example of a unicellular
  organism.
• Unicellular cells are only made up of 1 cell so
  that 1 cell has to do it all!

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Unicellular
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Humans are MULTIcellular.

• MULTICELLULAR means many-celled!
• Remember MULTI many.
• Plants, fungi, and animals are MULTICELLULAR.
• Multicellular cells have many specialized parts
  that have specific roles that they are in
  charge of.
• These parts and organs are called organelles.

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• What is the difference between a unicellular
  organism and a multicellular organism?

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The Cell Theory

• 1.All living things are made up of at least one
  cell!
• 2. Cells are the basic building blocks of life.
• 3. All cells come from preexisting cells

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Exploring the Cell

• Cells are microscopic this means we cannot see
  it with the naked eye.
• Prokaryotes (bacteria are smaller than
  eukaryotes!)
• We can view cells through a compound light
  microscope!

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Isnt there more than one kind of cell?

• YES!
• Plants, animals, fungi and protists have
  different cells than bacteria.

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There are 2 types of cells

• Prokaryotic cells
• Eukaryotic cells

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What do prokaryotic cells and eukaryotic cells
have in common?

• Cell membrane
• Cell wall
• Cytoplasm
• Ribosomes
• They both have nucleic acids (DNA /RNA)

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PRO vs. EU

• Fill out the T-chart as we go through prokaryotic
  vs eukaryotic organisms!

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PROKARYOTIC CELLS ONLY

• PROKARYOTES are different from eukaryotes in
  three ways
• Prokaryotes have NO NUCLEUS
• They have NO membrane-bound ORGANELLES
• BACTERIA ARE PROKARYOTES.

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Prokaryotic cells DO NOT contain membrane bound
organelles.
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Prokaryotes

• Small and simple
• Do NOT have a nucleus
• Do not contain membrane bound
• organelles
• Most abundant organisms on earth
• Two major groups -
• Archaebacteria (oldest known and live in extreme
  environments)
• Eubacteria (most common)
• All prokaryotes are unicellular

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PROKARYOTIC CELLS

• Prokaryotes do, however, have ribosomes, a cell
  wall, a cell membrane, and genetic material
  (nucleic acids).

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Bacteria(microorganisms)

• Bacteria is a prokaryotic organism

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• What are 3 characteristics that prokaryotic cells
  have?

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(No Transcript)
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• Why is bacteria (which is also known as a
  microorganism) considered a prokaryotic organism?
• What is 1 cool fact about bacteria that you did
  not know?

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PROKARYOTES

• Salmonella sp. found in raw chicken and eggs.
  (recently found in PB)

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PROKARYOTES

• Staphylococcus aureus causes staph infections

Staph infections are usually passed when the
infected area of one persons skin touches the
skin of another person. They must be kept covered
at all times and are EXTREMELY contagious!
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E. coli on the surface of a pinE.coli is found
in feces
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• What are 3 illnesses caused by bacteria?

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Sowhere are some places that bacteria can be
found?How about ALL OVER YOUR CELL
PHONESewwwwhttp//youtu.be/4lmwbBzClAc 
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Eukaryotes

• Contain a nucleus
• Contain membrane bound organelles
• Some are single-celled
• Organisms, most are multicellular
• Generally larger than prokaryotes
• Ex plants, animals, fungi, protists

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Eukaryotic cells HAVE membrane bound organelles.
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Eukaryotes

• Composed of 4 main parts
• cell membrane - outer boundary of the cell
• cytoplasm - jelly-like fluid interior of the cell
• nucleus - the "control center" of the cell,
  contains the cell's DNA (chromosomes)
• organelles - "little organs" that carry out cell
  functions

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• What are 3 characteristics about eukaryotic cells?

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EUKARYOTES

• ANIMALS

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EUKARYOTES
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EUKARYOTES
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EUKARYOTES