Function as an early warning system, notifying you that smoke is in the air.

The correct answer is smoke detectors:)

Air goes past the epiglottis and into the trachea when you breathe in. from there, it goes to your vocal cords in the larynx until it reaches the bronchi. from the bronchi, air passes into each lung.

You can always get a sexually transmitted disease. always ask for consent before doing anything..because you never know if your bf or gf has an std!