Does the respiratory system contain the lungs?
The respiratory system does contain the lungs because the respiratory system deals with breathing. Of course. Oxygen, anaerobic exercises, swimming, singing, can't you imagine??
Cigarettes contain many harmful ingredients like Tar, Arsenic (which is a poison), Nicotine (this is what makes you addicted to the cigarette) etc. The effect to the respiratory system varies from how much and the period of time you have been smoking. The damage to the respiratory system is the Alvoli in your lungs (Look like little sacs in your lungs) die and your lungs go black from the tar in the cigarette.