Dear Aydin Dilmaghanian,

it depends due to the radial architecture of the organ.....

And: It is simply a question of "anatomy" .

If you imagine a sketch of a testis you'll find out that in the place of efferent seminiferous tubules (efferent ductules) you will have more cross section profiles if you choose transversal plane (= cross section of ductules leaving the testis); for the which is more/less a mesh of ductules inside, near the entry of efferent ductules into the organ, you might have an equal chance to get cross sections in any plane (and naturally tangentially sectioned ones); for the part of "straight seminiferous tubules" (short distance within the tissue) you must have optimal transverse plane to get cross sections; For the "convoluted seminiferous tubules" (which lie more less "convoluted", therefore the name) within the testicular lobules, separated by the testicular septa, you should have a good chance to cut most of profiles perpendicular but also you will see for sure longitudinal as well as tangentially sectioned profiles. So IMO, if you are grossing a testis specimen by "capping" over the long convexity of the organ not too deeply you should get a lot of cross sections in the (z)one of convoluted seminiferous tubules for microscopy.

Dear Aydin Dilmaghanian

I'm in perfect agreement with what was said by Wolfgang, I would like to add just a few words to what was said.

In Anatomy and even more in histology what matters most before processing a biological sample is the symmetry, which is generally indicated by the geometric shape that has the biological sample in its entirety, only in function of this morphology the histologist can derive such are the best plans of cutting.

Best regards

Oh yes (:-)), dear Fabio, thank you so much for pointing out that (working and success in ) "our profession" mostly depends on the criteria you defined...Knowledge in "Anatomy" and "Histology" are indispensable prerequisites to do anything further....(be it experimentally or diagnostically...). Thank you for acknowledging my lengthy efforts to describe by words what can be seen in any histo-anatomical sketch (re a fundamental Histology book), best regards, Wolfgang

Dear Fabio Nobil & Wolfgang Muss

Thank you for your answers to my question.

Dear Aydin, you're welcome !

Best wishes and good luck, Wolfgang