Pharyngeal Arch Development
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Questions and Answers

What are the pharyngeal arches?

  • Rod-like thickenings of mesoderm in the wall of the foregut (correct)
  • Thickenings of ectoderm in the wall of the foregut
  • Rudimentary structures not involved in development
  • Surface elevations lateral to the developing pharynx

    • What do the pharyngeal arches contribute to?

  • Respiratory function
  • Development of the brain
  • Characteristic external appearance of the embryo (correct)
  • Formation of limb buds

    • What is another name for pharyngeal arches?

  • Branchial arches (correct)
  • Neural crest cells
  • Pharyngeal grooves
  • Pharyngeal pouches

    • What covers the pharyngeal arches externally?

    <p>Ectoderm</p> Signup and view all the answers

    How many pairs of pharyngeal arches are visible externally by the end of the fourth week?

    <p>Four pairs</p> Signup and view all the answers

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