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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

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

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.

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

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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

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

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