Health and Disease

• blood travels around the body by the circulatory system, which is made up of the heart, arteries, veins, valves and capillaries
• harmful substances in cigarettes:

  Tar, smoke, carbon dioxide, and nicotine
• Harmful substances effects:


  Tar-makes it more harder for gas exchange, can also lead to cancer
• harmful substances effects:


  nicotine- addictive and increases heart rate and blood pressure
• harmful substances effects:


  smoke- damage cilia hairs and can get bronchitis
• harmful substance effects:

  carbon monoxide- reduces the amount of oxygen that the blood can carry
• Smoking can affect the blood flow because tar builds up in the arteries and can decrease blood flow and also makes it harder for gas exchange