Embryology: Pharyngeal Arch Development
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Questions and Answers

From which embryonic tissue does ectomesenchyme, responsible for bone and fascia formation, originate?

  • Neural crest (correct)
  • Ectoderm
  • Endoderm
  • Mesoderm
  • Which pharyngeal arch gives rise to the hyoid bones and muscles of the face?

  • Third pharyngeal arch
  • First pharyngeal arch
  • Second pharyngeal arch (correct)
  • Fourth pharyngeal arch
  • How many cranial nerves innervate each pharyngeal arch?

  • Two
  • Three
  • Four
  • One (correct)
  • What do the pharyngeal pouches develop into?

    <p>Auditory tube, parathyroid glands, thymus</p> Signup and view all the answers

    What is the caudal extension of the genital fold that runs along the body wall and into the inguinal region called?

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

    In females, what does the inguinal fold become?

    <p>Broad ligament</p> Signup and view all the answers

    What becomes the male genital ligament known as mesoductus deferens?

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

    Which veins give rise to the portal vein?

    <p>Vitelline veins</p> Signup and view all the answers

    From which vein does the azygos vein develop?

    <p>Supracardinal vein</p> Signup and view all the answers

    What forms a shunt known as the ductus venosus within the liver?

    <p>Left umbilical vein and right hepatic vein</p> Signup and view all the answers

    Which veins supply the embryonic kidneys and gonads located in the intermediate mesoderm?

    <p>Right subcardinal venous network and supracardinal vein</p> Signup and view all the answers

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