The structure indicated is the corniculate cartilage
of the larynx. The corniculate cartilages are also known as the cartilages of Santorini
The larynx consists of several cartilages, as well as lots of small muscles and a fibroelastic membrane.
There are three pairs
of small cartilages, and three large unpaired
The large unpaired cartilages include the cricoid cartilage
, the thyroid cartilage
and the epiglottis
The small paired cartilages include the arytenoid
, the corniculate
and the cuneiform
The corniculate cartilages are small cone shaped cartilages which sit on the apices of the arytenoid cartilages.
Learn more about the larynx in this tutorial