Macrophage in lung. Coloured scanning electron micrograph (SEM) of a macrophage cell (pink) in an alveolus. Alveoli are the tiny air sacs that are the site of gaseous exchange in the lungs. Macrophages are a type of large white blood cell that are found in tissues rather than circulating in the blood. They recognise foreign particles,including bacteria,pollen and dust,and phagocytose (engulf) and digest them. Magnification: x1000 when printed 10 centimetres wide | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Gschmeissner, Steve |
Bildgröße: | 3500 px × 2631 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |