It is structure lying just at the top of trachea. It plays a significant role in the production of vocal sounds. The larynx is also responsible for the protection of windpipe against the entry of food particles. The larynx cartilage makes up the structure of the sound apparatus. There are nine laryngeal cartilages in the skeleton of this body part. Out of nine cartilages, six appear in the form of pairs. While the other three remain single. The unpaired cartilages are cricoids, thyroid and epiglottis.
On the other hand, the cuneiform, corniculate and arytenoids are three paired ones. However, talking of the interior of sound apparatus, you can distinguish it into three divisions, viz. subglottis, glottis and supraglottis. Meanwhile, there are also a number of intrinsic and extrinsic muscles that are present in the region. These muscular structures facilitate the functioning of the organ in various ways. For example, the intrinsic cricothyroid muscles help in the stretching and elongation of the vocal folds.
Different types of sensory and motor nerves innervate various muscular structures of larynx. They include vagus, superior laryngeal and recurrent laryngeal nerves. The vocal folds of voice box are of two types, i.e. false and true. Here the former do not contain muscle and have nothing to do with the production of sound. But they play their role in the resonance. The true mucosal folds, on the other hand, do have skeletal muscle and play an active role in phonation.
The Larynx Function:
Many anatomists consider phonation to be the secondary function of laryngeal structure. They are of the view that the primary role of larynx is to facilitate respiratory system of your body, especially breathing.
Respiratory Role: As a respiratory organ, it has two major tasks. The first one is the regulation of airflow into lungs. Secondly, the voice box is responsible for the protection of trachea. In this case, it prevents the entry of harmful environment substances, food particles and fluids.
Role in Phonation: The larynx definition reveals that it is an organ of voice generation. This role of the organ is of vital importance. Here, it enables human beings to communicate through language. The ability to speak distinguishes humans from all other creatures on the planet earth. Meanwhile, there are different other vocal organs, including uvula, palate, lips, teeth, tongue and gum ridge, etc. These vocal organs modify the sounds into various linguistic sounds that have meaning.
Larynx Infection and Other Diseases:
When you inhale polluted air, there are chances of larynx infection. This infection can cause difficulty in breathing. Also, it will pose hindrance in the production of sounds. There are also various other types of larynx diseases. In normal larynx, the vocal folds are pearly white in color. But, in case of an infection or some other disease, there are changes in their healthy appearance. Distortion of their structural settings may also occur.