EUROSCIENCE MSPC 234: Pharyngeal Apparatus and Derivatives
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Questions and Answers

What is a primary function of pharyngeal arches during embryonic development?

  • Establishment of the embryonic body form (correct)
  • Development of the circulatory system
  • Formation of the digestive system
  • Formation of the nervous system

    • Which of the following cell groups is NOT a derivative of mesoderm?

  • Paraxial
  • Intermediate mesoderm
  • Ectoderm (correct)
  • Neural Crest Cells

    • What is a common outcome of pharyngeal apparatus malformations?

  • Congenital anomalies
  • Neural tube defects
  • Craniofacial abnormalities
  • All of the above (correct)

    • During which stage of embryonic development do pharyngeal arches form?

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

    What is the primary function of neural crest cells?

    <p>Development of the nervous system</p> Signup and view all the answers

    Which of the following is a derivative of the pharyngeal pouches?

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

    What is the function of pharyngeal apparatus?

    <p>To give rise to arteries, muscles, cartilage, bone of face and neck</p> Signup and view all the answers

    What is the number of pharyngeal arches?

    <p>6</p> Signup and view all the answers

    What is the fate of the 5th pharyngeal arch?

    <p>It obliterates completely</p> Signup and view all the answers

    What is the sequence of appearance of the pharyngeal arches?

    <p>Cranial-to-caudal</p> Signup and view all the answers

    What forms the core of the pharyngeal arches?

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

    What do the muscle components of the arches have?

    <p>Their own nerve and arterial components</p> Signup and view all the answers

    What contributes to the formation of skeletal muscles of the face?

    <p>Emigrant neural crest cells</p> Signup and view all the answers

    What do the pharyngeal arches contain?

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

    Study Notes

    Pharyngeal Apparatus and Derivatives

    • Pharyngeal apparatus consists of bilateral mesodermal outpouchings of mesoderm on the developing pharynx
    • Gives rise to arteries, muscles, cartilage, and bone of the face and neck

    Pharyngeal Arches

    • 6 in number, but only 5 give rise to permanent structures
    • Appear in a cranial-to-caudal sequence
    • Each arch has a core of mesenchyme, ectodermal covering, and endodermal lining
    • Mesoderm forms face and neck musculature
    • Each arch is characterized by its own muscular components
    • Muscle components of arches have their own nerve and arterial components

    Pharyngeal Clefts and Pouches

    • Pharyngeal clefts are ectodermal
    • Pharyngeal pouches are endodermal

    Development of Pharyngeal Apparatus

    • Pharyngeal arches are formed from the mesodermal outpouchings
    • Emigrant neural crest cells contribute to the formation of skeletal muscles of the face
    • Contain cartilages

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    Description

    This quiz covers the pharyngeal apparatus, its contributions to embryonic body form, and derivative structures. It also discusses congenital anomalies and malformations of the pharyngeal apparatus.

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