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 (A)</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 (D)</p> Signup and view all the answers

In females, what does the inguinal fold become?

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

What becomes the male genital ligament known as mesoductus deferens?

<p>Mesorchium (B)</p> Signup and view all the answers

Which veins give rise to the portal vein?

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

From which vein does the azygos vein develop?

<p>Supracardinal vein (D)</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 (D)</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 (B)</p> Signup and view all the answers

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