5 Questions
What are the pharyngeal arches?
Rod-like thickenings of mesoderm in the wall of the foregut
What do the pharyngeal arches contribute to?
Characteristic external appearance of the embryo
What is another name for pharyngeal arches?
Branchial arches
What covers the pharyngeal arches externally?
Ectoderm
How many pairs of pharyngeal arches are visible externally by the end of the fourth week?
Four pairs
Test your knowledge on the development of pharyngeal arches, which are rod-like thickenings of mesoderm in the wall of the foregut and contribute to the external appearance of the embryo. Learn about their formation and significance.
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