chp 2 - Chapter 2 Click to edit Master subtitle style Cells...

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Click to edit Master subtitle style Chapter 2 Cells Cool factoid: Largest cell – egg Smallest cell - sperm
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General Information ¢ Smallest unit exhibiting all characteristics of life l Cell Theory All living things are composed of cells New cells originate from old cells Cells basic unit of life ¢ ¢ > 200 types of cells in humans ¢ ~8 - ~140 ± m (most 10-20) l Eye can visualize ~ 100 “ m
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General Information ¢ Various shapes l Round, square, flat, etc… l Smooth, bumpy, villi etc. ¢ Shape ↔ function!
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Ex. Red blood cell ¢ Smooth edges ¢ Flat ¢ Round
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Ex. Epithelial cell ¢ Straight edges ¢ Villi
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Medical terminology involving cells ¢ Atrophy – reduction in cell size mreduction in tissue size ¢ Hypertrophy– increase in cell size w/o mitosis ¢ Hyperplasia– increase in number of cells due to increased mitosis ¢ Apoptosis– programmed cell death ¢ Necrosis– cell death due to injury or disease
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Cell Differentiation ¢ One cell type becoming another cell
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chp 2 - Chapter 2 Click to edit Master subtitle style Cells...

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