Everything about The Thyroid Cartilage totally explained
The
thyroid cartilage is the largest of the nine
cartilages that make up the
laryngeal skeleton, the cartilage structure in and around the
trachea that contains the
larynx.
Structure
It is composed of two plate-like
laminae that come together on the anterior side of the cartilage to form a peak, called the
laryngeal prominence. This prominence is often referred to as the "
Adam's apple". The laryngeal prominence is obvious in both sexes, but it tends to be somewhat more robust in the adult male.
The lip of the thyroid cartilage just superior to the laryngeal prominence is called the
thyroid notch or
superior 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 posterior edge of each lamina
articulates with the
cricoid cartilage inferiorly at a joint called the
cricothyroid joint.
Movement of the cartilage at this joint produces a change in tension at the
vocal folds, which in turn produces variation in
voice.
The entire superior edge of the thyroid cartilage is attached to the
hyoid bone by the
hyothyroid membrane.
Function
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.
It also serves as an attachment for several laryngeal muscles.
Additional images
Image:Illu larynx.jpg|Larynx
Image:Traqueostomia.png|Tracheotomy neck profile
Image:Gray380.png|Muscles of the pharynx and cheek.
Image:Gray950.png|The cartilages of the larynx. Posterior view.
Image:Gray952.png|Ligaments of the larynx. Posterior view.
Image:Gray953.png|Sagittal section of the larynx and upper part of the trachea.
Image:Gray954.png|Coronal section of larynx and upper part of trachea.
Image:Gray955.png|The entrance to the larynx, viewed from behind.
Image:Gray957.png|Side view of the larynx, showing muscular attachments.
Image:Gray959.png|Muscles of larynx. Side view. Right lamina of thyroid cartilage removed.
Image:Gray960.png|Muscles of the larynx, seen from above.
Image:Gray1195.png|Front view of neck.
Image:Kehlkopf Pferd.jpg|Cut through the larynx of a horse
Further Information
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