Cholesterol, because it stiffens blood vessel walls and can clog arteries.
In an asthma attack, people have difficulties to breathe becuase the airway is reduced, the lungs excrete mucus, etc.
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Chemical breakdown is affected by it I just did in zymes treated by the track and accessory organs as well as hydrochloric acid secreted by the stomach the G.I. tract is protected from the corrosive actions of these enzymes and acid by a mucous membrane composed of epithelial cells which secrete mucus and fluid