cells cell is the basic building block that makes up all living things
TRANSCRIPT
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Cells
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Cellis the basic building block that makes up all living things
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Cell Functions
Take in food to store energyGet rid of body wastesMake new cells for growthRelease energyRespond to the environment
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nucleus
cell wallcell wallchloroplastschloroplasts
cell membrane
cytoplasm
vacuole
mitochondria
Plant Cell
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Animal CellVACUOLE
Cell MEMBRANECYTOPLASM
NUCLEUSMITOCHONDRIA
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Cell Parts and Functions
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Cell Membrane
Surrounds the cell to help hold it together
Allows materials to move in and out
Works like a gate in a walled city
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PICTURE OF A REAL CELL MEMBRANE
It has been magnified so that we can see it!
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Nucleus
Contains the chromosomes (DNA) which determines the characteristics
Controls cell reproduction and other functions
Like a king controlling his city
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Nucleus seen in a human cheek cell
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Cytoplasm
Found between the cell membrane and nucleus
Jellylike substance containing chemicals to keep the cell working
Like the space/air that fills the walled city
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Mitochondria
Releases energy from food
Like a power plant producing energy for the city
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Vacuoles
Used for storageStores food,
waste, or water
Like a water tower or a garbage dump for the city
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Cell Wall (Plants Only)
Outside cell membrane
Rigid layer that supports and protects the plant cell
Like a wall surrounding the city
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The cell walls of these onion skin cells can be seen in the
photograph below.
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Chloroplasts (Plants Only)
Makes food for the plant cell
Uses sun energy to make food (glucose) and oxygen
Like a restaurant or bakery in the city
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An Elodea leaf magnified 400X. The numerous green structures
are chloroplasts.
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The Parts of a Cell
Cell MembraneCytoplasmChloroplastCell WallVacuoleMitochondriaNucleus
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The Size of Cells
How Big is a Cell?
• Cells have a limit to how big or small they can be.
The head of a pin is about 2mm in diameter. A cell is even smaller. Nearly invisible without magnification, dust mites dwarf pollen grains and human cells. In turn, bacteria and viruses are even smaller.
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cell membrane
surrounds cell-holds it together
allows materials to pass in & out of cell
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cell
basic building block that makes up all living things
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cytoplasm
between cell membrane & nucleus
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chloroplast
•found in plant cells
•uses Sun’s energy to
make food (sugar) &
oxygen
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cell wall
found in plants outside the cell membrane gives extra support & protection
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vacuole
stores H20 & breaks down materials
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mitochondria
produce energy by cellular respiration
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cytoplasm
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cell membrane
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mitochondria
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chloroplast
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cell wall
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vacuole
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The skin on the Barbie doll is like the cell membrane of a cell because both are outside surfaces, and allow substances to pass in and out of the cell.
Cell Analogy Project
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Edible Animal CellEdible Animal Cellcell membrane = plastic bagJello = cytoplasm2 raisins = mitochondria 1 pear = nucleus2 peaches = vacuoles