List three Non-Specific / Natural / Innate barrier or mechanism; this are the first line of defense against diseases ?
1. Physical Barriers:
skin, Mucous membranes, nasal hairs, coughing/sneezing.
- 2. Chemical Barriers:
- - lysozymes in tears & saliver
- - Salt (NaCL) & Urea in prespiration
- - Acid & Enzymes in gastic juice
3. Genetic Barries:
Receptors that pathogens use to attach to their host.