Asthma is a problem of the respiratory system. In asthma, the periodic constriction of the bronchi and bronchioles makes it tougher to breathe in and out. Asthma can be triggered by airborne irritants such as chemical fumes and cigarette smoke.
Asthma is a problem of the respiratory system. In asthma, the periodic constriction of the bronchi and bronchioles makes it tougher to breathe in and out. Asthma can be triggered by airborne irritants such as chemical fumes and cigarette smoke.
