Which cartilage in the larynx is commonly referred to as the Adam's apple?

The thyroid cartilage is commonly referred to as the Adam's apple due to its prominence in the human neck, particularly in males. It is the largest cartilage of the larynx and consists of two shield-like plates that fuse at the front, creating a noticeable protrusion. This structure becomes more prominent during puberty when the larynx grows and is typically more noticeable in men than in women.

The other cartilages, while important for the structure and function of the larynx, do not have the same prominent anatomical feature that is associated with the Adam's apple. The cricoid cartilage, for instance, is a complete ring that provides support to the airway but lacks the projecting feature. The epiglottis plays a crucial role in preventing food from entering the trachea during swallowing but does not contribute to the external structure of the neck. Lastly, the arytenoid cartilages are small and situated at the back of the larynx, aiding in vocal cord movement, but are not externally visible like the thyroid cartilage.