what we call the protection that is the result of cilia, mucous, and extreme pH?

• Physical barrier protection of the innate immunity.

Explanation:

This is physical barriers protection which falls under the main group of immunity called innate immunity. When pathogens attempt to penetrate the tightly associated epithelial cells of skin and linings of various organs within out body, they are removed through mechanical means. In the upper respiratory tract, microorganisms are removed through production of mucus as well as action of hair-like cilia. Other protective barriers includes low temperature on skin, low pH in the stomach which inhibits growth of microorganisms.