Where is elastic cartilage typically found?

Elastic cartilage is a specialized form of cartilage that contains more elastic fibers than hyaline cartilage, giving it the ability to withstand repeated bending and maintain its shape. This type of cartilage is particularly important in structures that require flexibility combined with support.

The external ear, also known as the auricle or pinna, and the eustachian tube are typical locations where elastic cartilage can be found. The structure of the ear benefits from the flexibility provided by elastic cartilage, allowing it to return to its original shape after bending. Similarly, the eustachian tube, which connects the middle ear with the nasopharynx, needs to remain open in certain positions to equalize pressure and is supported by elastic cartilage, enabling it to adapt during movement without losing its functional integrity.

In contrast, the other options mention locations composed primarily of different types of cartilage. For example, the nasopharynx and trachea consist mainly of hyaline cartilage, known for its strength and support rather than flexibility. The menisci of the knee are made from fibrocartilage, which provides shock absorption and stability. Lastly, the pubic symphysis is primarily composed of fibrocartilage, which allows for slight movement and acts as a shock absorber in the pelvis