Anatomy of larynx Prof. Abdulameer Al-Nuaimi E-mail: a.al-nuaimi@sheffield.ac.uk E. mail: abdulameerh@yahoo.com

Larynx, extends from tip of epiglottis C3, to lower edge of cricoid cartilage C6. It is formed of cartilaginous framework, connected by ligaments and muscles, and lined by mucous membrane. Laryngeal cartilages: A- Single cartilages 1- Thyroid 2- Cricoid 3- Epiglottis B- Paired cartilages 1- Arytenoid 2-Corniculate 3-Cuneiform

Pharynx and larynx www.google.co.uk/search?

Relations of larynx

Laryngeal mucosa Larynx is lined by pseudo stratified ciliated columnar epithelium, with goblet cells (respiratory epithelium) Except the followings (they are covered by stratified squamous epithelium) 1-True vocal cords 2-Tip of epiglottis 3-Aryepiglottic fold

Skeleton of larynx Thyroid cartilage

Laryngeal cartilages

Laryngeal cartilages Arytenoid cart Thy aryt Lamina of Cricoid cart

Joints and membranes of larynx Cricothyroid joit Crico-arytenoid joint Membranes Conus elasticus Aryepiglottic membrane Throhyoid membrane

Laryngeal joints Cricothyroid joint Crico-arytenoid joint C

Conus elasticus Larynx viewed from above Rima glottidis Arytenoid cartilage Conus elasticus Larynx viewed from above

Aryepiglottic ligament (Aryepiglottic fold) Thyrohyoid membrane Aryepiglottic ligament Aryepiglottic fold Vestibular ligament (Conus elasticus) Laryngeal membranes

Muscles of larynx Cricothyroid muscle Posterior Crico-arytenoid muscle Lateral Crico-arytenoid muscle Transverse arytenoid muscle Ary-epiglottic muscle Thyro-arytenoid muscle on the conus elasticus Vocalis muscle Thyro-epiglottic muscle

Larynx Anatomy of Larynx www.google.co.uk/search? Laryngeal sinus Larynx coronal section

Posterior view of the larynx showing muscles of the larynx

Thyro-epiglottic muscle

Muscles of larynx

Abduction of vocal cords Due to abduction of arytenoid Rima glottidis Adduction of vocal cords Rima glottidis Abduction of vocal cords Due to rotation of arytenoids Rima glottidis

Nerve supply 1- Motor: all muscles are supplied by Recurrent laryngeal nerve, except crico-thyroid muscle which is supplied by external branch of superior laryngeal nerve. 2- Sensory: Above vocal folds: by the internal branch of Superior laryngeal nerve Below vocal folds: by Recurrent laryngeal nerve.

Nerve supply of the larynx

Nerve supply of larynx

Nerve supply of larynx

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