Lately in science I have been studying the Respiratory System and how smoking affects your lungs. So far I have learned that the reason people get addicted to cigerettes is because the nicotine in the tobacco goes directly to your brain and that changes something in your brain that makes you want more and if you don’t get it you get sick. People that smoke die 20 years younger than someone who doesn’t. The tobacco in the cigarette first attacks your Trachea (which connects your nose and mouth to your lungs and is an important part of the vertebrate respiratory system) and Cilia (small hairs that trap bacteria). With one cigarette over 4000 chemicals are released into almost every system of your body. The nicotine in cigarettes is only one of the many many chemicals that are working against your body.