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Rod shaped bacteria
Cell Theory 1. All living organisms are composed of one or more cells 2. Cells are the basic units of structure and function in an organism 3. Cells come only from the reproduction of existing cells
*Form follows function *Different cell shapes reflects different functions of cells *Each cell has a shape that has evolved to allow the cell to perform its function effectively
nerve cells can be up to 2m long to be able to transmit impulses from one area of an organism to another
Human egg cell
Some organisms are unicellular
The Cell
Eukaryote = organism made up of one or more cells that have a nucleus and membrane-bound organelles Organelle = well-defined, intracellular (in the cell) bodies that perform specific functions for the cell. Larger than prokaryotic cells
