i think carbon monoxide
It clogs the arteries which allows less blood to flow through that narrow space. This eventually causes a blood clot which may be fatal.
smoking can cause fat to build up in arteries and block them.nicotine makes arteries narrower.
cigarettes
It can cause atherosclerosis (hardening of the arteries due to plaque build-up), and increase your risk of coronary heart disease. The nicotine in cigarettes causes decreased oxygen to the heart muscle, increases blood pressure (hypertension) and it damages the heart wall tissue.
if you smoke your kids will think it is ok to smoke too. smoking is bad it causes arteries to your heart and cancer comes later. Cigarettes attack your heart. STOP SMOKING NOW !!!!!!!!!!!!!!!!
Nicotine
A heart attack is when the arteries become narrow and blood cannot flow as well as it should throughout the body and back to the heart. This causes a person to feel pain and could potentially cause death.
Arteries - > Arterioles -> Capillaries
cigarettes is a stick full of chemicals and causes cancer of lungs and other cancers
Nicotine.
Nicotine
sometimes it is a build up of cholesterol in the arteries, the cholesterol builds up causing the arteries to narrow and become smaller, so less blood can get through but the heart is still pumping at the same force so the pressure increases, there may be other causes but that is the main one that i know of.