lifestyle refers to the way a person lives :)
when a person is living with cigarettes,., the function of respiratory could be affected by having an abnormality regarding the heart beat of a person ,., :) as far as I know ., as a person puffs a cigarette ., it increases the heart beat which can also lead to heart attack - circulatory system
smoking can also lead to lung disease or the cause of lung cancer :) :D
hope it helps :)
