It is always important to know the main parts of the bicycle in case you need to some assistance. If you are in Italy I doubt that all the mechanics know the components of the bicycle in English language. So if you want to do an holiday in Italy with your bike you should know the names of the components in Italian language.
Let's start from the handlebar grip = manubrio and the steering wheel = sterzo .
Let's take a check on the seaddle = sedile. There also are the spoke = raggio and the tire = gomma, very useful if you have to change it ( I hope not!) The valve= valvola from where you can inflate your wheel.
One more very important component is the brake= freno, how you can do without it? No impossible. Now these are only the main parts of the bicycle and the skilled knows that it is a bit more complex. Anyway this is enough to survive with your bicycle in Italy Ready to go? Now is time of enjoy your bicycle!