mixture of chemicals
Collects on the airway linnings and alveoli
Builds up a thick layer that increases the distance gases have to diffuse through to get to the blood stream
These chemicals can cause an allergic reaction
Smooth muscle of airway contracts, making the lumen smaller for airflow to alveoli
Tar paralyses cilia so they can't move mucus
Tar stimulates goblet cells to enlarge and make more mucus
mucus collects on airways
Bacteria and virus' get trapped in mucus and can block bronchioles
Lungs become more suceptable to infections like flu and pneumonia
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