Thursday, October 29, 2009

THE CELL

A cell is hundreds of times smaller than a sand dust, so we can only see it through the microscope. With the microscope we can see all kinds of cells, but we can also see one cell and its parts. On the XIX century, scientist found out that all tissue, animals or vegetables were formed with cells. They are different types and shapes of cells. The shape they have is related to the function they do, for example we have some sphere shape, like the ones on our blood called red globule.

The cells born, reproduce and die. During these stages they eat, breath, and eliminate toxic substances and consume energy. The cells are related to the outside world in many ways, they can react to the light, nutriments or toxic substances.

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