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Cheek Cells!

Cheek Cells!. What is a cell?.

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Cheek Cells!

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  1. Cheek Cells!

  2. What is a cell? • At a microscopic level, we are all composed of cells. Look at yourself in a mirror -- what you see is about 10 trillion cells divided into about 200 different types. Our muscles are made of muscle cells, our livers of liver cells, and there are even very specialized types of cells that make the enamel for our teeth or the clear lenses in our eyes! • If you want to understand how your body works, you need to understand cells. Everything from reproduction to infections to repairing a broken bone happens down at the cellular level. If you want to understand new frontiers like biotechnology and genetic engineering, you need to understand cells as well.

  3. What is the Cell theory? • the theory that all organisms are composed by one or more cells, all cells are made up of pre-existing cells and that cells are the basic building blocks of life in all things. (proposed in 1838 by Matthias Schleiden and by Theodor Schwann) • http://www.youtube.com/watch?v=dscY_2QQbKU&feature=related

  4. Present your Actions and definitions to the class!

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