Anatomy Bones and Muscles · MU Pleven

64. Larynx – cartilaginous skeleton. Principal structure

Covers the framework of the larynx: its position in the neck and its functions as an airway valve and sound producer. It goes through the single cartilages (thyroid, cricoid, epiglottis) and the paired ones (arytenoid, corniculate, cuneiform), then the extrinsic and intrinsic ligaments and membranes. Also outlines the laryngeal cavity parts, with a table of the intrinsic muscles, and briefly the blood supply and innervation.

Inside: 8 sections · 11 labelled pictures · 1 table · 10 flashcards · 6 min

Topic 63 of 236 in the MU Pleven syllabus for Anatomy Bones and Muscles (Medicine, Year 2). The free AceMed note covers it in 8 sections, about 559 words (6 min of reading), with 10 flashcards.

In this note

  1. LARYNX
  2. Functions:
  3. Cartilages of the larynx:
  4. Ligaments:
  5. Laryngeal Cavity:
  6. Muscles of the larynx:
  7. Blood Supply of the larynx:
  8. Innervation:

LARYNX

  • It is a hollow musculo-ligamentous structure with a cartilaginous framework.
  • Site: it present in the front of the neck (anterior to the phalynx), and extends btw. C4 and C6 vertebrae.
  • The cavity of the larynx continuous with the trachea, and above opens into the pharynx

Functions:

  1. 1. Acts as valve to close lower respiratory tract protecting it from passage of foreign bodies
  2. 2. An instrument for sound production.

Cartilages of the larynx:

3 Single:

  • Thyroid: formed of 2 plates connected anteriorly giving (Adam's apple).
  • Cricoid : is ring like and continue below larynx as the trachea.
  • Epiglottis: a leaf like cartilage behind the tongue, closes the laryngeal inlet during deglutition.

3 paired:

  • Arytenoids: triangular in shape, having apex, base, and two processes (vocal process anteriorly, and muscular process laterally. They articulate with cricoid cartilage.
  • Corniculates: conical cartilages. Their bases articulate with apices of arytenoid cartilages.
  • Cuneiforms: club-shaped cartilages They are suspended by the fibro-elastic membrane of the larynx.

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