Development of Arterial Aortic Arches

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Questions and Answers

What is the fate of the 5th aortic arch during fetal life?

It degenerates very early in fetal life. (correct)

It develops into the external carotid artery.

It contributes to the formation of the aortic sac.

It forms part of the left subclavian artery.

Which of the following statements is correct regarding the 1st aortic arch?

It degenerates on both sides leaving the maxillary artery. (correct)

It forms the common carotid artery.

It contributes to the formation of the arch of the aorta.

It develops into the internal carotid artery.

What structures are formed from the 3rd aortic arch?

Innate artery and ductus arteriosus.

Maxillary artery and stapedial artery.

Right subclavian artery and left pulmonary artery.

Common carotid artery and external carotid artery. (correct)

Which artery is a remnant of the 4th aortic arch on the right side?

Right subclavian artery. Signup and view all the answers

What is the primary outcome of the left side of the 6th aortic arch?

It gives rise to part of the aortic arch. Signup and view all the answers

What happens to the dorsal aorta found between the 3rd and 4th aortic arches?

It degenerates on both sides. Signup and view all the answers

How does the aortic sac contribute to the fetal development?

It gives rise to the innominate artery. Signup and view all the answers

What is true about the 2nd aortic arch on both sides?

It degenerates leaving the stapedial artery. Signup and view all the answers

What anatomical structure forms the right subclavian artery?

Right 4th aortic arch Signup and view all the answers

Which part of the aortic sac contributes to the formation of the arch of the aorta?

Left horn of aortic sac Signup and view all the answers

How does the left recurrent laryngeal nerve relate anatomically to the ductus arteriosus?

It hooks around the ductus arteriosus Signup and view all the answers

What is the cause of a double aortic arch?

Persistent right dorsal aorta distal to right 4th arch Signup and view all the answers

Which condition is associated with the abnormal communication of the ductus arteriosus?

Patent ductus arteriosus Signup and view all the answers

Which aortic arch develops into the ductus arteriosus?

Sixth aortic arch Signup and view all the answers

What happens to the right recurrent laryngeal nerve during development?

It degenerates with the fifth aortic arch Signup and view all the answers

What does coarctation of the aorta refer to?

Narrowing of the arch after the left subclavian artery Signup and view all the answers

Study Notes

Development of Arterial Aortic Arches

Arterial aortic arches form during embryonic development.
Two primitive aortas form, ventral and dorsal.
The ventral aortas fuse to form the aortic sac.
The lower parts of the dorsal aortas fuse, forming a single dorsal aorta.
Six arterial aortic arches develop, leading to a single dorsal aorta.
The fifth aortic arch degenerates early in fetal development.

Fate of Arterial Aortic Arches

The first aortic arch gives rise to the maxillary artery.
The second aortic arch gives rise to the stapedial artery.
The third aortic arch forms:
- Common carotid artery
- Proximal portion of the internal carotid artery
- External carotid artery
The fourth aortic arch forms:
- Right subclavian artery on the right side
- The main part of the arch of the aorta on the left side.
The sixth aortic arch forms: - Ventral part - right pulmonary artery - Dorsal part - ductus arteriosus
The aortic sac:
- Its cranial portion degenerates
- The caudal portion divides into two parts:
  - The left horn forms the arch of the aorta
  - The right horn forms the innominate artery
Seventh intersegmental a:
- The right forms part of the right subclavian artery
- The left forms the left subclavian artery
The arch of the aorta is formed from: the left horn of the aortic sac, the left fourth arch, and the dorsal aorta distal to the fourth arch.
Recurrent laryngeal nerve:
- Left hooks around the ductus arteriosus
- Right hooks around the distal portion of the fourth arch.

Anomalies of Arterial Aortic Arches

Double aortic arch: Persistent right dorsal aorta distal to the fourth arch.
Right-sided aortic arch: Reversal of normal development between the two sides.
Retropharyngeal subclavian: Abnormal origin of right subclavian artery.
Patent ductus arteriosus: Failure of the ductus arteriosus to close.
Transposition of great vessels: Reversed pattern of spiral aortico-pulmonary septum.
Coarctation of the aorta: Narrowing of the aortic arch after the arch gives off the left subclavian artery.

Questions

Question: Patent ductus arteriosus is abnormal communication between which of the following?
- Answer: Ascending aorta and pulmonary trunk.
Question: Which aortic arch gives rise to the ductus arteriosus?
- Answer: Sixth aortic arch.

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Description

This quiz explores the formation and fate of arterial aortic arches during embryonic development. It covers the formation of primitive aortas, the fusion processes leading to the development of the dorsal aorta, and the specific arteries that arise from each aortic arch. Test your knowledge on the intricate details of vascular embryology.