Nicotine:
Nicotine is also found in pesticide. It's an extremely addictive chemical. It is absorbed by the body very quickly and gets to the brain within 7 seconds. It also increases the heart rate and blood pressure.

Carbon Monoxide:
Carbon Monoxide is also found in car exhaust fumes. It's a poisonous gas that stops your body getting the oxygen it needs.

It thickens the blood and makes it hard for the heart to pump the blood around the body and can cause heart attacks.

Tar:
Tar is used to surface roads. Tar can cause cancer as well as damaging the lungs. Tar is also responsible for staining a smoker's teeth and fingers.

Arsenic:
Arsenic is used in rat poison. It can cause damage to a smoker's heart.