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.
1 Function of endocrine system (specific chemical control at cell, tissue, and organ level). 2  Endocrine system = make hormones = specific control of all target cells of that hormone.3  Definition of endocrine gland, hormone. 4  endo = within, crine = to secrete.ndocrine system: Hormones. 1  Function of endocrine system (specific chemical control at cell, tissue, and organ level). 2  Endocrine system = make hormones = specific control of all target cells of that hormone. 3  Definition of endocrine gland, hormone.