it somehow prevents foreign materials to get through the body.
The stomach has a lining of protective mucus.
the answer is mucus
the function of the mucus blanket in the lungs is to filter and moisten the air.
Since they are guard dogs, and very protective.
it is the mucus secretion
Mucus protects stomach lining from gastric acids.
Mucus secreted by goblet cells trap the foreign particles. Cilia push the particles out wards. This protects your lungs from damage by the foreign particles.
The function is to get rid of excess mucus.
Mucus consists of mucin, water, cells, and inorganic salts and is secreted as a protective lubricant coating by cells and glands of the mucous membranes..
The mucus protects the inner lining of the stomach from the action of acids.
Mucus
The function of mucus is actually to capture any foreign materials it comes in contact with, kind of like a lizard lick.