Cilia lining the respiratory tract perform which job?

1. Cilia can move an entire cell, as in paramecia, or move substances along the outer surface of a cell. 2. In the respiratory tract they do the second job. 3. They trap particulate matter and move it toward the nostrils. 4. Moving the ovum toward the uterus is what the cilia of the Fallopian tubes do, so that answer names the wrong site. 5. Respiratory cilia move trapped particles outward. _Source: OpenStax Biology (1st ed., CC BY 4.0), Ch 4 "Cell Structure", section 4.5 The Cytoskeleton_