Post on 30-Jun-2015
description
Anatomy of
The Larynx
RESPIRATORY SYSTEM
By:
Dr. Kamal Motawei
Larynx (voice box)
• Why! :
– Sphincter action
– Voice production
• Where!
In the upper part of the
front of the neck.
Opposite C3-C6.
It opens into the
laryngopharynx and is
continuous with the
trachea
Relations of the larynx
• Anterior: – Skin
– Infrahyoid muscles
– Pyramidal lobe of thyroid
• Lateral: – Great vessels of the
neck
– Thyroid lobe
• Posterior: – laryngopharynx
Structure of the Larynx
• The larynx is made up
of:
– Cartilages
– Ligaments &
membranes
– Muscles
– Mucous membrane
– It has nerves & blood
vessels
Cartilages of the Larynx
• Single:
– Epiglottis
– Thyroid
– Cricoid
• Paired:
– Arytenoids
– Corniculates
– Cuneiforms
Cartilages of the larynx
Cartilages of the larynx
Cartilages of the larynx
Cartilages of the larynx
Cartilages of the larynx
Membranes & Ligaments
• Thyrohyoid membrane
• Median & Lateral
thyrohyoid ligaments
• Fibroelastic membrane:
– Upper part: Quadrangular
membrane. Its lower border
forms the vestibular
ligaments
– Lower part: cricothyroid
ligament. Its upper border
forms the vocal ligaments
• Aryepiglottic folds
Inlet
It is directed backwards and upwards into the hypopharynx
• Boundaries:
– Epiglottis: infront
– Aryepiglottic folds:
sides
– Arytenoids &
interarytenoid fold:
behibd
• Valliculae
• Piriform fossae
Cavity of the larynx
• Upper part of the
cavity (Vestibule)
• Middle part:
- Rima vestibuli
- Sinuses and
saccules of the
larynx
-Rima glottidis
• Lower part