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Cell Biology 4/25/2017 Why Study Cell Biology? “…For every living organism is, or at some time has been, a cell.” E.B. Wilson, 1925 G. Podgorski, Biol 1010
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Cell Biology 4/25/2017 Red and white blood cells Cells are Us A person contains about 100 trillion cells. That’s 100,000,000,000,000 or 1 x 1014 cells. There are about 1,000 different cell types in humans nerve cell Cells are tiny, measuring on average about cm (20 um) across. That’s about 1250 cells per inch. G. Podgorski, Biol 1010
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How big are cells? Bacteria e.g. Eschericia coli (aka E.coli)
Size=1 µm by 3 µm (one millionth of meter!)
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Human red blood cell = 8 µm
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Largest cell = yolk of an ostrich egg
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Cell Biology 4/25/2017 The Cell Theory ( )** Schleiden All organisms are composed of one or more cells. Cells are the smallest living things. Cells arise only by division of previously existing cells. Schwann G. Podgorski, Biol 1010
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All cells today came from an original cell….
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Bacteria on the Head of a Pin
Cell Biology 4/25/2017 Bacteria on the Head of a Pin G. Podgorski, Biol 1010
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Cell Biology Animal Cell 4/25/2017 G. Podgorski, Biol 1010
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The Nucleus Think of the nucleus as the cell’s control center.
Cell Biology 4/25/2017 The Nucleus Think of the nucleus as the cell’s control center. Two meters of human DNA fits into a nucleus that’s meters across. G. Podgorski, Biol 1010
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The Lysosome Functions: Digesting food or cellular invaders
Cell Biology 4/25/2017 The Lysosome Functions: Digesting food or cellular invaders Recycling cellular parts G. Podgorski, Biol 1010
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Energy!! The Mitochondrion Cell Biology 4/25/2017
G. Podgorski, Biol 1010
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Mitochondria and Health
Cell Biology 4/25/2017 Mitochondria and Health G. Podgorski, Biol 1010
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Cell Biology 4/25/2017 Plant Structures G. Podgorski, Biol 1010
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The Chloroplast The Solar Panel of the Plant Cell! Cell Biology
4/25/2017 The Chloroplast The Solar Panel of the Plant Cell! G. Podgorski, Biol 1010
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Two Other Unique Features of Plant Cells
Cell Biology 4/25/2017 Two Other Unique Features of Plant Cells The central vacuole may occupy 90% of a plant cell. G. Podgorski, Biol 1010
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Cell Walls = Great Strength
Cell Biology 4/25/2017 Cell Walls = Great Strength G. Podgorski, Biol 1010
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Cell Biology 4/25/2017 Cytoplasm G. Podgorski, Biol 1010
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The Cytoplasm in Action
Cell Biology 4/25/2017 The Cytoplasm in Action A white blood cell using the cytoplasm to grab a bacterium. G. Podgorski, Biol 1010
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How do cells move?** Flagella Cilia False feet
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Cell Biology 4/25/2017 Cell movement G. Podgorski, Biol 1010
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Two Different Types of Cells**
Cell Biology 4/25/2017 Two Different Types of Cells** A eukaryotic cell Prokaryotic cell G. Podgorski, Biol 1010
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Us vs. Them -Eukaryotes and Prokaryotes
Cell Biology 4/25/2017 Us vs. Them -Eukaryotes and Prokaryotes G. Podgorski, Biol 1010
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Eukaryotes Prokaryotes Amoeba Zombie Cells
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