Pharyngeal Arches And Pouches: Embryology Simplified

Pharyngeal Arches And Pouches: Embryology Simplified

Question 1. Derivatives of Third Pharyngeal Arch.
Answer:

• Third Pharyngeal Arch Cartilage:
  • Greater cornua of hyoid bone.
  • Lower part of thebody of hyoid bone.
  • Muscles stylopharnygeus.
  • Third Pharyngeal Arch Nerve: Glosso-pharyngeal.

Question 2. Pharyngeal pouches. (or) Formation and fate first pharyngeal pouch.
Answer:

• In the interval between any two adjoining pharyngeal arches, the endoderm extends outwards in the form of a pouch called endodermal/pharyngeal pouches.
• The endodermal pouches take part in the formation of several important organs.