The External Ear, Which Includes the Auricle (Or Pinna) and External
The external ear, which includes the auricle (or pinna) and external auditory canal, is composed of cartilage covered with skin. The primary function of the auricle is to: A)gather and direct sound waves toward the inner ear. B)concentrate and conduct incoming sound waves into the external auditory canal. C)collect and amplify incoming sound waves by facilitating tympanic membrane vibration. D)facilitate air conduction of sound waves.
B The auricles are fixed in position and lie close to the head; they concentrate incoming sound waves and conduct them into the external auditory canal.