how to click same classed element each time on page with protractor

    it('it should click each of the title elements to reveal its content', function(){
        element(by.css('.cardtitle')).click();
    });

I have the above lines which work properly and click the first item in the series of 3 with this class. I need to click all 3 items with this class using protractor, how do I do this? (the are all on the same page, very straightforward)

for whats its worth there will be upcoming instances where there may be 2 or 5 items to click all sharing the same class.

thanks!