Embryonic Development of Aortic Arches and Dorsal Aortae
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Questions and Answers

What happens to the dorsal aorta between the entrance of the third and fourth arches?

  • It disappears (correct)
  • It forms the ductus arteriosus
  • It remains unchanged
  • It is transformed into the innominate artery
  • Where does the right dorsal aorta disappear according to the text?

  • Between the third and fourth arches (correct)
  • Between the first and second arches
  • Between the second and third arches
  • Between the sixth and seventh intersegmental arteries
  • What is the role of recurrent laryngeal nerves according to the text?

  • Supply nerves to the larynx and have a recurrent course (correct)
  • Form the innominate artery
  • Supply blood to the larynx
  • Supply nerves to the heart
  • What does the right recurrent laryngeal nerve hook around?

    <p>Right subclavian artery</p> Signup and view all the answers

    What happens to the distal part of the sixth aortic arch on the left side?

    <p>It forms the ductus arteriosus</p> Signup and view all the answers

    From which intersegmental artery is the left subclavian artery formed?

    <p>Seventh intersegmental artery</p> Signup and view all the answers

    What happens to the sixth aortic arch on the left side?

    <p>Persists as the ductus arteriosus</p> Signup and view all the answers

    Which artery is formed from the right seventh intersegmental artery?

    <p>Right subclavian artery</p> Signup and view all the answers

    What becomes the pulmonary arteries?

    <p>Left pulmonary artery</p> Signup and view all the answers

    What happens to the distal portion of the sixth aortic arch on the right side?

    <p>Loses connection with the dorsal aorta and disappears</p> Signup and view all the answers

    Which artery does the left distal part of the sixth aortic arch persist as?

    <p>Ductus arteriosus</p> Signup and view all the answers

    Where do the seventh intersegmental arteries migrate to?

    <p>Level of the fourth arch</p> Signup and view all the answers

    What is the classical clinical sign of coarctation of the aorta?

    <p>High blood pressure in the arms and low in the legs</p> Signup and view all the answers

    What happens to the right recurrent laryngeal nerve as described in the text?

    <p>Hooks around the right subclavian artery</p> Signup and view all the answers

    Which great vessel abnormality involves persistence of the right dorsal aorta between the seventh intersegmental artery and its junction with the left dorsal aorta?

    <p>Double aortic arch</p> Signup and view all the answers

    What is a common abnormality associated with premature infants among the great vessels?

    <p>Patent ductus arteriosus</p> Signup and view all the answers

    Which structure remains in place on the left side and hooks around the ligamentum arteriosum?

    <p>Right recurrent laryngeal nerve</p> Signup and view all the answers

    What role does the fifth arch play in the definitive vascular pattern transformation?

    <p>It never fully forms during development</p> Signup and view all the answers

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