Diferences between plants cells and animal cells:

Plant cells are much like animal cells, except for 3 important differences.
A) Plant cells have cell walls, which make them appear rectangular-shaped. These structures are composed of cellulose, hemicellulose, and a variety of other materials.
B) Plant cells have chlorophyll, the light-absorbing pigment required for photosynthesis. This pigment is contained in structures called chloroplasts, which makes plants appear green.
C) Plants cells have a large, central vacuole. While animal cells may have one or more small vacuoles, they do not take up the volume that the central vacuole does (up to 90% of the entire cell volume!). The vacuole stores water and ions, and may be used for storage of toxins

sitio de informacion: http://www.northern.edu/ramsayj/etechWeb/cells.htm

sitio de picture: http://www.bbc.co.uk/schools/ks3bitesize/science/images/sci_dia_126.gif