The<unk> s are a pair of small three-sided pyramids which form part of the larynx, to which the vocal cords are attached.
Each is pyramidal in form, and has three surfaces, a base, and an apex.
The posterior surface is a triangular, smooth, concave, and gives attachment to the<unk> ei obliquus and transversus.
The antero-lateral surface is somewhat convex and rough. On it, near the apex of the<unk> , is a rounded elevation (colliculus) from which a ridge (crista arcuata) curves at first backward and then downward and forward to the vocal process. The lower part of this crest intervenes between two depressions or foveæ, an upper, triangular, and a lower oblong in shape; the latter gives attachment to the Vocalis muscle.
The medial surface is narrow, smooth, and flattened, covered by mucous membrane, and forms the lateral boundary of the intercartilaginous part of the rima glottidis.
The base of each<unk>  is broad, and on it is a concave smooth surface, for articulation with the cricoid<unk> .
Its lateral angle is short, rounded, and prominent; it projects backward and lateralward, and is termed the muscular process; it gives insertion to the posterior cricoarytenoid muscles behind, and to the lateral cricoarytenoid muscles in front.
Its anterior angle, also prominent, but more pointed, projects horizontally forward; it gives attachment to the vocal ligament, and is called the vocal process.
The apex of each<unk>  is pointed, curved backward and medialward, and surmounted by a small conical,<unk> nous nodule, the corniculate<unk> .
Arytenoid cartilage
Adenoid
Gyrus
Mastoid process
Nasal bone
Cauliflower ear
Dental alveolus
Palatine tonsil