why do you want to know the csa of the aorta. it expands with bp and age

I am interested in the descending aorta and unfolding because one can measure cardiac output from the oesophagus using Doppler

lester ah critchley hong kong

I want to know thickness of tunica media aorta from rat, after rats give some extract, that i think it will change the thickness of aorta

Thanks for answer Camille Balarini, can i ask why must 10 slices per animal?

Thank for your answer, Camille Balaeini, you are so helpfull...are there ebook about manual ImageJ?

http://imagej.nih.gov/ij/docs/guide/index.html

Image J user guide-is this what you are asking about?

Thank ulkem aydin..:)