What aspect of vocal fold structure is described by the Cover Body Model?

The Cover Body Model describes the structure of the vocal folds in terms of their layered organization and the distinct mechanical properties of these layers. The model identifies two primary components: the "cover," which consists of flexible, pliable layers, and the "body," which refers to the stiffer, more rigid inner layer.

In this context, the correct answer illustrates that the vocal folds have a stiff inner body that provides strength and support, while the outer layers are flexible, allowing for the necessary range of motion and vibration needed for producing sound. This dual structure is critical for effective phonation, as it allows the outer layers to vibrate freely while maintaining stability from the inner body.

Understanding this model is essential for comprehending how vocal fold mechanics influence voice production, and highlights the balance between rigidity and flexibility inherent in their structure.