The external part of the ear that we see is the
(A) auricle,
(B) pinna,
(C) external auditory meatus,
(D) both A and B
The correct answer and explanation is:
The correct answer is (D) both A and B.
The external part of the ear that we see is called both the auricle and the pinna. These terms refer to the same anatomical structure, which is the visible portion of the ear. It is made up of cartilage and skin and plays a key role in collecting sound waves from the environment. The auricle (or pinna) helps direct sound into the ear canal, enhancing the process of hearing.
The auricle has a somewhat funnel-like shape and consists of several parts, including the helix (the outer edge), the lobule (the soft, fleshy part), the tragus (the small prominence in front of the ear canal), and the antihelix (the inner fold of the ear). These features serve not only to collect sound waves but also to help in the localization of sounds, particularly in determining their direction.
The function of the auricle in the auditory system is important because it amplifies sound waves by funneling them into the external auditory meatus (the ear canal), which then leads to the eardrum. The pinna’s shape and structure also play a role in distinguishing different frequencies of sound. This anatomical feature is especially critical in high-frequency sound localization.
Though the terms auricle and pinna are often used interchangeably, it’s worth noting that some specialists may use “auricle” to refer to the entire outer ear, including the ear canal, while “pinna” specifically refers to the visible external portion. However, for most general purposes, both terms describe the same structure, making option (D) the most accurate answer.