Final answer:
The auricular surface refers to the external ear structures on the lateral surface of the head, including the auricle and the ear canal. The auricle directs sound waves toward the auditory canal, which enters the skull through the external auditory meatus.
Step-by-step explanation:
The auricular surface refers to external ear structures on the lateral surface of the head, including the auricle and the ear canal back to the tympanic membrane. The auricle, also known as the pinna, is the large fleshy structure on the lateral aspect of the head. It helps direct sound waves toward the auditory canal, which enters the skull through the external auditory meatus.