Central nervous- because of nicotine it effects part of your brain, makes your eyesight poor, and can lessen your sense of smell
Respiratory system- completely damages lung tissue, makes it very hard to filter harmful chemicals
Cardiovascular- causes blood sugar to go up which makes you want more later on, causes blood vessels to tighten which restricts the flow of blood, increases risk of stroke
Digestive- Smokers have a lot of oral problems, such as yellowing of the teeth and tooth loss, increases mouth and throat cancer