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Just passport. Nothing more. i submitted copies of my passport and visa pages when I applied. @ Nas man no medicals was requested, although am registered with NHS and did some test when i came in, I think that helped too cause they would always wanna do medicals.
 
Hi, they gave me 5 days to submit passport without asking me for anything in addition. Mine was simply Gods grace as I have been denied before.
 
As I heard, Canadian visa office give 30 days to submit passport, is it true?

How did you send your passport? Did you do that your self or follow the procedure they asked you to do?