Describe the external ear. What does it do?
collects sound waves, outer portion is the auricle, consists of elastic cartilage that continues to grow throughout our lifetime. external auditory meatus passes into the temporal bone, hairs near the opening that guard the tube. Lined with modified sweat glands called ceruminous glands that secrete cerumen or ear wax. Helps to prevent the tympanic membrane from drying out and losing flexibility. text for more