Introduction to cells

Have you thought about how there are things that make up your body and make it work or how you can move your fingers without really having to think about it? Right now as you are reading this just stretch out your arm, move your fingers and just think about it. How the brain messages travel down to your fingers then how do your fingers interpret them, and then eventually, which is really a split second, move. Well some of the things that help do that are cells. Cells can range from spidery starfish looking things (nerves) to flat plate lookings things (red blood cells). They all have a different function to them, like the nerves feel things and the red blood cells move oxygen to your tissues. But then it is almost like the cell has a body of its own. It has an outer layer like skin called the cell membrane, a brain called the nucleus, etc. There are about 200 different types of cells in your body and about 20 different types of organelles or parts of a cell. There are about 2 billion muscle cells in your heart. So based on that information how many cells do you think there are in the body? Click here to see the cell rap. (by Ilo)