Larynx Short Question And Answers

Cartilages of larynx (or) thyroid cartilage (or) Action & insertion of posterior cricoarytenoid muscle (or) Vocal cords/vocal folds
Answer:

• Larynx contains 9 cartilages
  1. Unpaired-3
     • Thyroid
     • Cricoids
     • Epiglottis
  2. Paired -3
     • Arytenoids
     • Corniculate
     • Cuneiform

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1. Thyroid Cartilage:

• V-shaped in cross section
• Consists of right & left laminae
• Each lamina is roughly quadrilateral in shape

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2. Cricoid Cartilage:

• Cricoid Cartilage is shaped like a ring
• Cricoid Cartilage encircles the larynx below the thyroid cartilage
• Narrow anterior part is called arch & broader posterior part is called lamina

Cricoid Cartilage Attachments:

• Anterior part
  • Triangular cricothyroid
  • Tensor of vocal cord
• Anterolateral aspect
  • Lateral cricoarytenoid
  • Adductor of vocal cord
• Lamina
  • Posterior cricoarytenoid

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3. Epiglottis:

• Epiglottis is a leaf-shaped cartilage
• Upper end is broad & free
• Lower end is pointed & attached between two laminae of thyroid cartilage
• Aryepiglottic folds are attached to right & left margins
• Anterior surface is connected
  • To tongue by median glossoepiglottic fold
  • To hyoid bone by hyoepiglottic ligaments

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4. Arytenoid cartilage:

• Pyramid shaped cartilage
• Apex articulates with corniculate cartilage
• Base articulates with lateral part of the upper border of cricoids lamina

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5. Corniculate cartilage:

• Small conical nodules
• Articulates with apex of arytenoids cartilage

6. Cuneiform cartilage:

• Two small rod shaped pieces of cartilage placed in aryepiglottic folds

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