jueves, 24 de septiembre de 2009

Looking inside Cells (p.60-67)

“COMPARING PLANT AND ANIMAL CELLS”

Nucleus: Directs all of the cells activities including reproduction.

Mitochondria: Most of the cell’s enemy produced within these rod-shaped organelles.

Cytoplasm: Includes a gel-like fluid in which many different organelles are found.

Ribosome: These small structures function as factories to produce proteins. Ribosome may be attached to the endoplasmic reticulum, or they may float in the cytoplasm.

Cell Membrane: Since an animal cell does not have a cell wall, the cell membrane forms a barrier between the cytoplasm and the environment outside the cell. The cell membrane protects the cell and regulates what substances enter and leave the cell.

Vacuole: Most mature plant cell have one large vacuole. This sac within the cytoplasm store food, water, waste and other materials.

Lysosome: These small organelles contains chemicals that break down food particles and worn-out cell parts.

Cell Wall: In a plant cell, a stiff wall surrounds the membrane giving the cell a rigid boxlike shape.

Chloroplast: These organelles capture energy from sunlight and use it to produce food for the cell.
By Javier García
M12

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