Its nails (3rd one) im sure about it
Answer:
Cilia that line our respiratory system help trap dust and other foreign particles, thereby preventing them from further entering our body and causing problems.
Answer:
Cellulose is the main substance found in plant cell walls and helps the plant to remain stiff and strong. Humans cannot digest cellulose, but it is important in the diet as a source of fibre. Cellulose is used to make clothes and paper.
Explanation:
have a nice day,
-cherry :)