Cricoid

Cricoid is a ring-shaped structure that forms part of the larynx, also known as the voice box, in the respiratory system. It is the only complete ring of cartilage around the trachea and plays a crucial role in maintaining the open passage for air flow.

Anatomy

The cricoid cartilage is located below the thyroid cartilage and above the trachea. It is shaped like a signet ring, with the broad part (lamina) facing posteriorly and the narrow part (arch) facing anteriorly. The cricoid cartilage is connected to the thyroid cartilage by the cricothyroid ligament and to the first tracheal ring by the cricotracheal ligament.

Function

The primary function of the cricoid cartilage is to provide support to the larynx and maintain an open airway. It also serves as a point of attachment for various muscles, ligaments, and membranes that help in the movement of the larynx during speech and swallowing.

Clinical Significance

The cricoid cartilage is of particular importance in anesthesia and emergency medicine for the procedure known as cricoid pressure or Sellick's maneuver. This procedure is performed to prevent regurgitation during rapid sequence intubation.

See Also

• Larynx
• Respiratory System
• Thyroid Cartilage
• Trachea

References

Cricoid Resources
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