The nasal passages are lined with a membrane that produces mucus Mucus is one of the body's defense systems: Thin clear liquid, traps small particles.
Agent Based Pharmacometric and Physiologic Insights Meyer Katzper January 2007 2007 International Conference on Health Sciences Simulation.
Body Defence Prepared by Ms W.S.Kwan Pathogens Microorganisms causing diseases eg. bacteria viruses fungi protozoa.
Khaled R. Girgis, MD, PhD Allergist and Clinical Immunologist
Host defenses are composed of two complementary, frequently interacting systems: (1)innate (nonspecific) defenses, which protect against microorganisms.
