Prime objective of this lecture is to present on Tobacco – Inside the Body. Here briefly focus on how tobacco affects our body. Brain: Nicotine, the drug that makes tobacco addictive, goes to your brain very quickly. Mouth: Tobacco stains your teeth and gives you bad breath. Heart: Smoking increases your heart rate and blood pressure and causes heart disease and heart attacks. Lungs: Smokers have trouble breathing because smoking damages the lungs. Skin: Smoking causes dry, yellow skin and wrinkles.