History of the Cell Chapter 4.

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Presentation transcript:

History of the Cell Chapter 4

Discovery of Cells Robert Hooke --- Discovered and named the first cell Anton van Leeuwenhoek --- Discovered 1st living microscopic organisms.

Schleiden --- Concluded that all plants are made of cells. Schwann – Concluded that all animals are made of cells. Virchow --- Discovered all cells come from other cells

Cell Theory Parts 3 parts to the cell theory: Cells are the basic unit of life All organisms are made of 1 or more cells All cells come from already existing cells

Cell Diversity Size Shape Most cells visible only with a microscope Cells are limited in size by ratio between outer surface area & volume Surface area & volume do not increase at the same rate As size increases, volume increases faster than surface area Shape Cells come in varieties of shape Diversity reflects a diversity of functions. Ex. Nerve cells

Prokaryotic vs. Eukaryotic Prokaryotic = Unicellular; cells that lack membrane-bound nucleus & other organelles. Example = bacteria cells Eukaryotic = cells that contain membrane-bound nucleus & other organelles. Examples = plants & animal cells

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