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Cells and Cell Theory Mr. Stoll and Miss Else Biology Room 314.

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Presentation on theme: "Cells and Cell Theory Mr. Stoll and Miss Else Biology Room 314."— Presentation transcript:

1 Cells and Cell Theory Mr. Stoll and Miss Else Biology Room 314

2 Cell Theory  Cells are the basic units of structure and function in living things  ALL LIVING THINGS ARE MADE UP OF CELLS!  Two objects were invented in Holland ~1600’s: a telescope and a microscope

3 Van Leeuwenhoek  Van Leeuwenhoek was the first to observe living cells  He studied bacteria from teeth and protozoa from pond water  He used the microscope to study MICROORGANISMS http://www.nhc.ed.ac.uk/images/collections/invertebrates/protozoa/LgParasitic.jpg

4 Hooke  Hooke used the microscope to study plant stems, wood and cork  Unable to observe living cells, but named them “chamber cells”  First to pioneer the study of cells http://woodscience.oregonstate.edu/images/RProgs_dougfircross(60).jpg http://www.concord.org/~btinker/workbench_web/unitIV_revised/starch/images/leaf_cells_annot.jpg http://www.microscopyu.com/galleries/smz1500/images/corkcellslarge.jpg

5 Other discoveries…  Robert Brown saw a dark structure near center of the cell, the nucleus  Matthias Schleiden stated all plants are made up of cells  Theodor Schwann stated animals are made up of cells too. http://137.222.110.150/calnet/cellbio/image/typical%20cell%20nucleus-electron%20micrograph.jpg http://images.encarta.msn.com/xrefmedia/aencmed/targets/illus/ilt/T059292A.gif http://137.222.110.150/calnet/cellbio/image/typical%20cell%20nucleus-electron%20micrograph.jpg

6 Cell Structures  The cells of all organisms have 3 basic structures: Cell Membrane Nucleus Cytoplasm  There are a few that are different from plant to animal cells: Plants have Cell Walls and Vaculoes, animals cells DO NOT

7 http://sun.menloschool.org/~birchler/cells/animals/nucleus/nucleus1.jpg http://www.cs.utexas.edu/users/s2s/latest/cell1/src/images/cell_membrane.jpg http://discover.edventures.com/images/termlib/c/cytoplasm/support.gif

8 Prokaryotic Cells  Lack membrane-bound nucleus  Genetic material is in circular loops called PLASMIDS  Very small  3 shapes: rod shaped Spherical Spiral  Binary Fission http://library.thinkquest.org/C004535/prokaryotic_cells.html

9 Eukaryotic Cells  Membrane-bound nucleus  Genetic material is contained in the nucleus  Eukaryotes are typically multicellular Animals Plants Fungi Protists  Divide by sexual/asexual reproduction http://kentsimmons.uwinnipeg.ca/cm1504/Image125.gif

10 http://www.windows.ucar.edu/earth/Life/images/celltypes.gif

11 http://www.phschool.com/science/biology_place/biocoach/images/cells/allcell.jpg


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