Final answer:
The acinus is not a part of the larynx; it is the structure that is not located within the larynx among the given options.
Step-by-step explanation:
The larynx is a complex structure involved in breathing, swallowing, and voice production. It contains several components including cartilage, epiglottis, and vocal cords. While the epiglottis and vocal cords are explicitly mentioned as parts of the larynx structure, which serve functions in voice production and preventing food from entering the trachea, the acinus is not mentioned. An acinus refers to a cluster of cells in the pancreas or lungs that secretes substances, and it is not a component of the larynx. Therefore, among the options given, B. Acinus is the correct answer as it is not located within the larynx.