Passive smoking is when someone breathes in the combination of: Smoke exhaled by a smoker + Smoke from the end of a burning cigarette or cigar. This smoke is also referred to as second-hand smoke or environmental tobacco smoke. The Effects of Passive Smoking. The scientific evidence about passive smoking shows us just how dangerous second-hand smoke really is. Here are the facts about passive smoking: Non-smokers exposed to second-hand smoke have an increased risk of lung cancer; Non-smokers who live with a smoker are 20-30% more likely to develop lung cancer
The endocrine system is made up of a group of glands that produce the body's long-distance messengers, or hormones. Hormones are chemicals that control body functions, such as metabolism, growth, and sexual development.
The nervous system controls all the other functions of the body. It controls breathing, the beating of the heart, and the functions of all the other organs. Like the other body systems, we couldnât live without it.