D 2 Choose the best answer.
Cilia and sticky mucus aid the ___ in catching potentially dangerous particles so they can be coughed or sneezed out of the body.
reproductive system
respiratory system
digestive system
integumentary system

The correct answer is the “respiratory system.” Cilia, tiny hair-like structures lining the respiratory tract, work tirelessly alongside sticky mucus to trap inhaled particles, such as dust and pathogens. This dynamic duo helps keep our lungs clear, ensuring that only clean air reaches our vital organs.

Using this cleansing mechanism, our bodies can expel harmful substances, preventing respiratory infections. When we cough or sneeze, it’s a dramatic exit for all the unwanted debris! So the next time you clear your throat, remember that your respiratory system is just doing its job—superhero style!