Question

Saliva is also antibacterial. because the nasal passage and lungs are coated in ____________ , many germs are trapped in this substance and soon ____________ down the esophagus.

Answer 1

mucus, swallowed

Saliva is secreted from the salivary gland and they are watery substances formed in the mouth of animals. In Human, saliva is made up of 98% water, mucus, electrolytes, epithelial cell, and electrolytes. However, saliva contains mediators such as mucus secreted by esophagus and lactoperoxidase enzymes.