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Published bySharleen Marsh Modified over 9 years ago
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All living things are made of cells. Cells are the basic unit of structure and function in living things. New cells are produced from existing cells.
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Anton van Leeuwenhoek Dutch Businessman 1600’s Invented first powerful microscope (300X) Examined pond water Saw “little animals”
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Simple Microscope-1 lens. Ex. Magnifying lens Compound Light Microscope- uses light and many lenses to view small objects. Ex. *Our Lab*
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1.) Body Tube- tube of mirrors connecting objective lens and eyepiece 2.) Revolving Nosepiece- moves lens into place 3.) Low Power Objective- 4x or 10x; locates specimen 4.) Medium Power Objective- 10x; locates specimen 5.) High Power Objective- 40x; greater magnification
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6.) Stage Clips- holds slides in place 7.) Diaphragm- controls the amount of light 8.) Illuminator/Light- 9.) Eyepiece (Ocular Lens)- piece you look through, magnifies 10 times (10x) 10.) Arm- supports body tube
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11.) Stage- holds the slide Stage Opening- circle where light passes through 12.) Coarse Adjustment- used for FIRST focusing, moves body tube 13.) Fine Adjustment- sharpens image, final focusing 14.) Base- bottom
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Slide- holds the specimen (glass or plastic) Slide Cover- covers specimen so it doesn’t move Lens Paper- cleans lenses
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One hand on arm, one hand on base, electric cord securely wrapped and looking forward.
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Ocular Lens X Objective Lens =Total Magnification 10XX4X =40X 10XX10X =100X 10XX40X =400X
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Put slide under stage clips. Focus using low power (4X). Coarse -> Fine Switch to higher power (10X or 40X). *ONLY USE FINE ADJUSTMENT ON 40X LENS!
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Robert Hooke- English Physicist observed plant cells named the word “cell” (Jail cells)
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Cell Membrane- ALL cells are surrounded by a thin flexible barrier. Nucleus- Large membrane enclosed structure that contains genetic material in the form of DNA and controls many of the cells activities.
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Enclose DNA in their nuclei
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Cells that do not enclose DNA in their nuclei
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ProkaryoticEukaryotic SimpleComplex UnicellularMostly Multicellular No NucleusNucleus No OrganellesOrganelles First Cells on Earth Ex. BacteriaEx. Plant & Animal Cells
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Plant CellAnimal Cell Eukaryotic Cell WallCell Membrane Photosynthesis/ChlorophyllObtain Energy/ Eat Boxlike ShapeVarious Shapes
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