oh dear! oh dear! the list of plot holes in bleach just keeps growing.... lol... its as though tite kubo is slapping us in the face....
first.. tite kubo should have explained why hollows have holes in their chests in the first friggin arc when we actually gave a crap.... i mean we knew how they were created... their bodies corrode from gradually losing the chain of fate attached to their bodies
but
if hollows lost hearts thus have gaping holes in their chests, and the power from their hearts become their masks and also their power source.... then why the heck do vizards have mask????
and why do the espada not have holes through their hearts but in different parts of their bodies (e.g nnoitra has his hole in his eye)??????????? LOL
why not just clarify right from the very begining??? i feel as though this mangaka is making it up as he goes along... i don't feel as though theirs a huge amount of thought gone into the story