Answer:
To moisten and to protect the airway from stuff like unknown pathogens and infection
Explanation:
The Trachea also known as the windpipe has tons of 'little hairs' called cilia in the epithelium that protect the throat. When someone smokes or breathes in gases it is destroyed and exposes the trachea. But thats another story. :)
D) during the menopause there’s a suspension of the mestrual cycle
Light energy is converted into chemical energy through the process of photosynthesis.
Answer:
Spread
Explanation:
People use envelopes very often. The germs people carry are put into the envelope and then it's sent out to many others.
