What is the main characteristic of cilia in relation to asbestos exposure?

Cilia are tiny hair-like structures that line the respiratory tract and play a vital role in protecting the lungs from inhaled particles, including asbestos fibers. When asbestos is present in the air and is inhaled, cilia help to move these harmful particles upward toward the throat, where they can be expelled from the body, either by coughing or swallowing. This process is essential for clearing out potentially damaging substances and maintaining respiratory health.

The ability of cilia to assist in expelling particles is particularly important in the context of asbestos exposure, as it can help reduce the risk of asbestos-related diseases by ensuring that these dangerous fibers do not remain in the lungs. This function highlights the body's natural defense mechanisms against airborne toxins and emphasizes the importance of cilia in maintaining respiratory health in environments where exposure to harmful substances is a concern.