Biology

DISEASES OF THE RESPIRATORY SYSTEM

DISEASES OF THE RESPIRATORY SYSTEM Asthma Asthma is a chronic disease characterized by narrowing of air passages. Causes: Allergy Due to pollen, dust, fur, animal hair, spores among others. If these substances are inhaled, they trigger release of chemical substances and they may cause swelling of the bronchioles and bring about an asthma attack. Heredity …

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