Question
All are true regarding the structure marked with arrow except:
A. Pulmonary artery develops from 6th arch
B. Maxillary artery derives from 1st arch
C. All 6 arches are not present simultaneously
D. 5th arch is absent in 5% of embryos
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Correct Answer » D Explanation |
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Ans;D. 5th arch is absent in 5% of embryos
This structure is Arch of aorta
- All 6 aortic arches are not present simultaneously. In 50% of embryos 5°’ arch is never formed.
- There is formation of maxillary artery from 1st arch;
- Hyoid & stapedial arteries from 2nd arch; common,
- Internal & external carotid from 3rd arch;
- Arch of aorta & right subclavian artery from left & right 4th arch respectively;
- Pulmonary artery from 6th aortic arch