What exactly is a cell!?
It is a basic unit of structure and function in all organisms. It is a membrane "sac" that holds organelles. Check out this music video by, They Might Be Giants for an appropriate introduction to cells: |
There are many different types of cells because there are so many different functions for cells! Not only that but they are all sizes! To get an idea of how big some cells are compared to a coffee bean, click on the interactive website below and zoom in all the way!
Using the diagram below, what are two major differences between a plant and an animal cell? Click on the picture to see why these cells have different parts!_
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http://www.maxgames.com/play/cellcraft.htm