<prompt> The left recurrent laryngeal nerve recurs around theLeft primary bronchusleft subclan aeryLeft subclan veinDuctus aeriosus  <response>: Early in embryological development, both the right and left recurrent laryngeal nerves hook recur around aoic arch 6. The left aoic arch 6 persists as the ductus aeriosusdistal pa while proximal pa of it forms pulmonary aery. 6TH phyrangeal arch derivatives:- Nerve-reccurent laryngeal nerve Aery- pulmonary aery and ductus aeriosus Muscles - all muscles of larynx except cricothyroid. 