cells in living things unit cell theory’s 3 parts 1.all living things are composed of cells....
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Cells In Living Things UnitCell Theory’s 3 Parts1. All living things are composed of cells.
2.Cells are the basic units of structure andfunction.
3.New cells are produced from existing cells.
Scheildan, Schwann,and Virchow
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Basic Cell Structure• There are many differences between cells.
Cells have different shapes & functions
• ALL cells have the following:cell membrane & cytoplasm
Stem Cells
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2 Types of Cells
• Prokaryotes• Usually smaller• Have cell membrane and
cytoplasm• No nuclei (nucleus)• Ex. All bacteria
E. Coli• No membrane bound
organelles
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E coli
Salmonella
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2 Types of Cells
• Eukaryotes• Usually bigger• Have cell membrane
and cytoplasm• Do contain a nuclei
(nucleus)• Ex. Animals, humans &
plants• Have membrane bound
organelles
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Eukaryotic Cells
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What types of cells are these?
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3 Types of Cell Movement
• FlagellumLong whip-like structure that is used
for movement. Ex. sperm
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3 Types of Cell Movement• Cilium-
Short hair-like projections, that are used for movement.
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3 Types of Cell Movement• Pseudopods
Temporary projections of cytoplasmEx. Amoebas
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Cilia? Flagellum? Or Psuedopods?
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Cell Organelles(Mini “organs” inside a cell)
• CytoplasmGel-like substance
Ex. Fruit + Jell-O
Organelles Cytoplasm
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Cell Parts• Nucleus = “Brain” Control Center
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Cell Parts
• Cell Membrane = “Skin” All cells are surrounded by a cell
membrane. A thin layer of lipid & protein that
separatesthe cells contents from the outside environment.
• Made up of a phospholipid bi-layer
• Head = hydrophilic = water loving• Tail = hydrophobic = water hating
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Cell Parts• Cell Wall –• Provides support and
protection for PLANT cells
• Only in plant cells• Chloroplast –
Organelle that captures the energy from sun-light and converts it into chemical energy
• Found in plant cells only
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Cell Parts• Centriole –
Helps organize cell division /reproduction
• Vacuole –Sac-like structures which store materials such as H2O, salt, and other organic moleculesLarger vacuoles = plants Smaller vacuoles = animals
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Cell Parts• Mitochondria –
Power house of cellConverts chemical energyfrom food into compoundseasier for the cell to useATP(adenine triphosphate)
• Ribosomes –Makes proteinsLocated in the cytoplasm“free”Also located on the RER
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2 Types of Endoplasmic Reticulum• Smooth Endoplasmic
Reticulum• “ER” / “SER –
Smooth = no ribosomes Makes lipids & carbohydratesMakes poisons, waste & othertoxic chemical harmlessHelps transport materialsthrough the cell
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2 Types of Endoplasmic Reticulum• Rough
Endoplasmic• Reticulum “RER” –
Rough = ribosomesMakes proteins &modifies proteins
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Cell Parts• Lysosomes –
Food particles are digested by enzymesOld organelles are decomposedOld organelles go through absorption(meaning they are absorbed into the cell tobe recycled.)Filled with enzymes
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Cell Parts• Golgi Apparatus / Golgi Complex –
Made proteins are sent to their final destinations or out of the cell