Asthma treatment. Artwork showing the action of a bronchodilator drug breathed into the respiratory system from an aerosol inhaler to treat asthma. The bronchi,covered in bands of cartilage (purple),lead to smaller bronchioles (smooth white airways) that end in clusters of alveoli air sacs (white). Nerve fibres (yellow),arteries (red) and veins (blue) are also seen. The bronchodilator drug widens the narrowed bronchi which contain sputum,or phlegm (yellow). In asthma,a trigger,such as an allergen,causes the bronchioles to narrow and become inflamed. This results in increased production of mucus,further reducing the lungs' oxygen capacity | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Bavosi, John |
Taille de l’image : | 3408 px × 4148 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |