Final answer:
Cerumen, or earwax, inhibits bacterial growth, waterproofs the ear canal, and keeps the tympanic membrane pliable, allowing it to vibrate effectively and transmit sound waves to the inner ear.
Step-by-step explanation:
Cerumen, also known as earwax, carries out multiple functions in the ear. It helps to inhibit bacterial growth by providing a protective barrier. It also waterproofs the ear canal by trapping moisture, preventing damage to the delicate structures inside the ear.
Additionally, cerumen keeps the tympanic membrane pliable (the tympanic membrane is also known as the eardrum), allowing it to vibrate effectively and transmit sound waves to the inner ear.