Mucus droplets. Coloured scanning electron micrograph (SEM) of droplets (green) of mucus in the trachea (windpipe). The droplets are seen on epithelial cells. Mucus is a substance secreted by many interior epithelial surfaces,such as the lining of the lungs,the nasal passages,and the digestive and reproductive systems. Mucus consists of various substances depending on location,but generally has a lubricating function. The trachea is the tube that leads from the mouth to the lungs,and the mucus traps airborne pathogens and particles | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Gschmeissner, Steve |
Bildgröße: | 3376 px × 4075 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |