What happens when you smoke?

What happens when you smoke;

The heart speeds up, from 10 to 20 beats per minute

—The blood vessels constrict, or tighten, so that blood pressure goes up 5 to 10 points.

—The temperature of the skin drops by 6 degrees Fahrenheit (that's because the blood is rushing to the heart, where it would be needed in a real crisis)

—The level of blood sugar, the body's store of energy, falls, because the blood sugar is being burned up in a stressed out reaction.

—The hypothalamus, which regulates hunger, gets a “speed-up” message, so the appetite falls too.

—When you smoke, the first thing that happens is a mix of gases is released around your eyes, nose and throat. This happens within the first few seconds. Your eyes may water, your nose might run and your throat will most likely become irritated.