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Mr. Stoll and Miss Else Biology Room 314

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1 Mr. Stoll and Miss Else Biology Room 314
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

7 http://discover. edventures. com/images/termlib/c/cytoplasm/support

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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