Describe how mucus and cilia help to keep the airway free of dust and
bacteria.

Why aren't the stains like crystal violet and safranin washed away with water during simple staining?

In which way are mercury and venus similar? they both rotate from east to west. they are both small and rocky. they both have thick atmospheres. they both are similar to earth in structure.

Adoença vitiligo afeta qual doença do corpo?