MODEL RELEASED. Asthma relief. Elderly man using an aerosol inhaler to control an asthma attack. Asthma attacks vary in severity from breathlessness,dry cough,wheezing,or a feeling of chest tightness,to chronic breathing difficulty. All symptoms are caused by narrowing of the bronchioles in the lungs and triggered by a variety of stimuli including infection,exertion,emotional stress,and allergens such as pollen and dust. Inhalers contain bronchodilator drugs (which widen the airways) and/or steroids (which reduce inflammation). Although asthma freequently begins early in life,it can develop at any age | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Watson, Garry |
Bildgröße: | 1925 px × 2709 px |
Modell-Rechte: | vorhanden |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |