What is the name of the narrow canal that leads from the outer ear to the eardrum?

• A. Ear Canal
• B. Auditory Tube
• C. Eustachian Tube
• D. Lateral Canal

Answer: (A)

The correct term for the narrow canal that leads from the outer ear to the eardrum is the Ear Canal, also known as the external auditory canal. This structure is critical in the auditory system as it serves to channel sound waves from the external environment towards the eardrum, where vibrations occur. The design of the ear canal, which is approximately 2.5 centimeters in length, helps in amplifying sounds and providing a path for sound waves to travel.

In contrast, the other options refer to different structures within the auditory or respiratory systems. The Auditory Tube, also known as the Eustachian tube, connects the middle ear to the nasopharynx and helps equalize air pressure in the ear. The Eustachian Tube serves a different function and is not a part of the external ear structure. Similarly, the Lateral Canal is not a common term associated with the anatomy of the ear. Recognizing each of these structures and their unique functions is essential to understanding the anatomy involved in hearing.