|The cartilages of the larynx.|
|Gray's||subject #236 1073|
|Precursor||4th and 6th branchial arch|
It is composed of two plate-like laminae that fuse on the anterior side of the cartilage to form a peak, called the laryngeal prominence. This prominence is often referred to as the "pomus Adami" or "Adam's apple". The laryngeal prominence is more prominent in adult male than female because of the difference in the size of the angle: 90° in male and 120° in female.
The lip of the thyroid cartilage just superior to the laryngeal prominence is called the superior thyroid notch, while the notch inferior to the thyroid angle is called the inferior thyroid notch.
Layers and articulations
The two laminae that make up the main lateral, surfaces of the thyroid cartilage extend obliquely to cover either side of the trachea. The oblique line marks the superior lateral borders of the thyroid gland.
The thyroid cartilage forms the bulk of the anterior wall of the larynx, and serves to protect the vocal folds ("vocal cords"), which are located directly behind it.
Changing the angle of the thyroid cartilage relative to the cricoid cartilage changes the pitch.
It also serves as an attachment for several laryngeal muscles.
- Thyroid+cartilage at eMedicine Dictionary
- lesson11 at The Anatomy Lesson by Wesley Norman (Georgetown University) (larynxsagsect)