ANATOMY OF Larynx

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ANATOMY OF Larynx

• BY DR SOBIA IKRAM

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Table of Contents

• Objectives for this lesson
• External Anatomy and Functions of the Larynx.
• Internal Anatomy and Important relations of the
  Larynx.
• Anatomy of the Cartilages of the Larynx.
• Internal Anatomy of the membranes , Ligaments and
  Muscles of the Larynx.
• Treatment of Obstruction of the Larynx. (
  Tracheotomy and Cricothyrotomy ).

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Objectives

• When you finish this lesson, you should be able
  to
• Describe the Functions and Structure of the
  Larynx.
• Identify the Internal Anatomy and Relations of
  the Larynx.
• Identify the Anatomy of the Cartilages of the
  Larynx.
• Understand the Internal Anatomy of the Membranes
  , Ligaments and Muscles of the Larynx.
• Explain the Treatment of the Obstruction of the
  Larynx.

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The Larynx

• The larynx is the portion of the respiratory
  tract containing the vocal cords
• A 2-inch-long, tube-shaped organ, opens into the
  laryngopharynx above and is continuous with the
  trachea below.

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FUNCTIONS OF LARYNX

• The larynx assist in
• Deglutition (swallowing)
• Respiration (breathing)
• Main function of larynx is
• Phonation (voice production)

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ANTERIOR VIEW OF LARYNX
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Structure

• The larynx consists of four basic components
• A cartilaginous skeleton
• Membranes and ligaments
• Muscles

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The Cartilages

• THE CARTILAGENOUS PART comprised of
• Single Cartilages
• Thyroid
• Cricoid
• Epiglottis
• Paired Cartilages
• Arytenoid
• Corniculate
• Cuneiform

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Thyroid Cartilage

• Thyroid cartilage is the largest cartilage of the
  larynx.
• It has two parts that are join together in the
  center.
• Central prominence is called ADAMS APPLE

superior cornu
Oblique line
inferior cornu
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Cricoid Cartilage

• Lies below the thyroid cartilage
• Forms a complete ring
• Has a narrow anterior arch a broad posterior
  lamina

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Epiglottis

• Leaf shaped, situated behind the root of the
  tongue
• Connected
• In front to the body of hyoid bone
• By its stalk to the back of thyroid cartilage .
• Upper edge is free.

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FRONT AND LATERAL VIEW OF EPIGLOTTIS
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Arytenoid Cartilages

• Small, pyramidal in shape
• Situated at the back of the larynx.

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Corniculate Cuneiform Cartilages

• Corniculate Cartilages
• Small nodules
• Join with arytenoid cartilages
• Cuneiform Cartilages
• Small rod shaped.
• Do not join with any other cartilage .

E
VF
CU
CO
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Membranes Ligaments

• Thyrohoid membrane,
• Cricothyroid membrane
• Cricotracheal membrane
• There are three ligaments.

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• THANK YOU