Cell BiologyPage 16

Size

Extremely smallNeed special lens to see them

Robert Hooke – 1660Invented MicroscopeToday10 to 1,000 times

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Cell TheoryALL living things are made of one or more cells

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Parts of a Cell - ORGANELLES

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Cell WallWho? Plants and some bacteriaFunction: Tough outer shell that protects cell

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Cell Membrane (plasma)Who? All cellFunction: Barrier that separates inside from outside

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Who? All cells except bacteriaFunction: Control center

All information needed for entire organism

Nucleus

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MitochondriaWho? All cells except bacteriaFunction: Energy

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Endoplasmic ReticulumWho? All cells except bacteriaFunction: Protein ModificationsRibosomesWho? All CellsFunction: Make Protein

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Golgi BodiesAll cells except bacteria

Distributes materials

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ChloroplastsWho? Plants OnlyFunction: Capture energy from sun to make food

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VacuoleWho? All Cells except bacteriaFunction: Storage Space

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LysosomeWho? All Cells except bacteriaFunction: Digestion

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Bacteria

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Cells are ten times smallerContains: Cell membrane, DNA, Ribosomes

VirusThey are 10 to 100 times smaller than bacteriaCopy themselves inside of cells only