I am doing some research about cellar evlution ，so I need exact data about the cellar size of the mammal organ.Where I can get these data.

I'm not sure I completely understand your question but initially you could submit the search "Cellular Evolution" to:

www.google.com

http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?DB=pubmed


Which mammal organ are you referring to? there are many!

the organ such as lung,liver,kidney,skin, and so on

Do you mena the size of the cells or the number of cells per organ?

For animals commonly used in research I think you can find both answers with some hunting in the literature. However, I'm not sure how to make that search any easier. I thinkk you need to spend a lot of time in the library chasing down articles. Try some text books, since they often have general information and may have some of the references you need.

Thanks,and I only want to know the size of the cell

Not a definite answer to your question, because there is not one because of the plethora of different cell types in mammals, but you might find this useful

http://www.answers.com/topic/cell-growth

Thanks