The Cell The basic unit of life Can you guess that cell type???
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Transcript of The Cell The basic unit of life Can you guess that cell type???
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The Cell
The basic unit of life
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Can you guess that cell type???
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Macrophage killing bacteria
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Nerve Cell
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Human Cheek Cell
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Plant (onion) Cells
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Sperm and Egg Cells
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Paramecium(single celled organism)
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Amoeba(single celled organism)
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Bacteria Cells
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Cellular Variation• Cells come in numerous shapes and sizes.
Their shape is usually somehow related to their function.
• Some organisms like plankton, amoeba and bacteria are composed of a single cell. Bacteria cells do NOT contain a nucleus = prokaryotic
• Other, more complex organisms, are made of mnay different cells with a nucleus = eukaryotic
• Humans are made up of about 100 trillion cells!
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Van Leeuwenhoek the “father of microscopy”
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Robert Hooke + Cork = “Cells”
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Times have changed, yet …
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The Cell Theory
1. All living things are made of cells.
2. Cells are the basic unit of life.
3. All cells come from preexisting cells.
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How big is a cell?
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What size are the cells we looked at last class?
• Actual Size=• field of view ÷• estimate of # of specimens that fit across F.O.V