Simran Vinaik
Last Activity: 7 Years ago
Secreting membrane lining all bodily passages that are open to the air,as part of the
digestive and respiratory, Urinary and reproductive tracts is called as mucosae or mucosa. It act as mechanical barrier within body to fight infections. Many bacteria and viruses can invade through intact mucosal surfaces. Natural defences of mucosae includes:
1. Mechanical washing by tears and urine
2.CIliary action of mucosal cells moving mucus and debris
3. Lyzozyme in surface fluid