The slit-like space between the left and right vocal cords, called the rima glottidis, is the narrowest part of the larynx. The vocal cords and the rima glottidis are together designated as the glottis. The laryngeal cavity above the vestibular folds is called the vestibule. The very middle portion of the cavity between the vestibular folds and the vocal cords is the ventricle of the larynx, or laryngeal ventricle. The infraglottic cavity is the open space below the glottis. Location
In adult humans, the larynx is found in the anterior neck at the level of the cervical vertebrae C3–C6. It connects the inferior part of the pharynx (hypopharynx) with the trachea. The laryngeal skeleton consists of nine cartilages: three single (epiglottic, thyroid and cricoid) and three paired (arytenoid, corniculate, and cuneiform). The hyoid bone is not part of the larynx, though the larynx is suspended from the hyoid. The larynx extends vertically from the tip of the epiglottis to the inferior border of the cricoid cartilage. Its interior can be divided in supraglottis, glottis and subglottis. Cartilages
There are nine cartilages, three unpaired and three paired (3 pairs=6), that support the mammalian larynx and form its skeleton. Unpaired cartilages:

Thyroid cartilage: This forms the Adams apple (also called the laryngeal prominence). It is usually larger in males than in females. The thyrohyoid membrane is a ligament associated with the thyroid cartilage that connects it with the hyoid bone. It supports the front portion of the larynx.
Skull bossing is a descriptive term in medical physical examination indicating a protuberance of the skull, most often in the frontal bones of the forehead ("frontal bossing"). Although prominence of the skull bones may be normal, skull bossing may be associated with certain medical conditions, including nutritional, metabolic, hormonal, and hematologic disorders. Frontal bossing
Frontal bossing is the development of an unusually pronounced forehead which may also be associated with a heavier than normal brow ridge. It is caused by enlargement of the frontal bone, often in conjunction with abnormal enlargement of other facial bones, skull, mandible, and bones of the hands and feet. Frontal bossing may be seen in a few rare medical syndromes such as acromegaly – a chronic medical disorder in which the anterior pituitary gland produces excess growth hormone (GH). Frontal bossing may also occur in diseases resulting in chronic anemia, where there is increased hematopoiesis and enlargement of the medullary cavities of the skull. Associated medical disorders
Rickets
Achondroplasia
Acromegaly
Basal cell nevus syndrome
Congenital syphilis
Cleidocranial dysostosis
Crouzon syndrome
Cryopyrin-Associated Periodic Syndrome (CAPS – PFS)
Ectodermal dysplasia
Extramedullary hematopoiesis
Fragile X syndrome
Hurler syndrome
Osteopathia Striata with Cranial Sclerosis
Pfeiffer syndrome
Rubinstein-Taybi syndrome
Russell-Silver syndrome (Russell-Silver dwarf)
Thanatophoric dysplasia
Talfan syndrome
Trimethadione (antiseizure drug) use during pregnancy
Beta-thalassemia (due to expansion of bone marrow secondary to increased hematopoiesis; see Extramedullary hematopoiesis)
Hallermann-Streiff syndrome


== References ==