Which cartilage can only be seen from behind the larynx?

The correct answer is the arytenoid cartilage, which plays a crucial role in the function of the larynx. These paired cartilages sit atop the cricoid cartilage and are essential in the process of phonation, as they serve as attachment points for the vocal cords.

The arytenoid cartilages are positioned at the back of the larynx and have a pyramidal shape, allowing them to pivot and regulate tension in the vocal cords during sound production. Since they are situated on the posterior aspect of the larynx, they can only be fully appreciated when viewed from behind, making them unique among the laryngeal cartilages.

The thyroid cartilage, the largest cartilage of the larynx, is easily visible from the front and forms the Adam's apple. The cricoid cartilage, forming a complete ring around the trachea, is also positioned lower and can be seen from the front. The epiglottis is a leaf-shaped structure that protects the airway during swallowing and can be viewed from a frontal perspective as well.

Understanding the anatomical positioning of these cartilages is essential for recognizing their functions and the overall structure of the larynx.