aortic arch

https://doi.org/10.1351/goldbook.10418

Curved portion of the aorta between its ascending portion exiting the heart and its descending portion that proceeds to the arteries of the thoracic and abdominal cavities and the lower body.

Source:
PAC, 2016, 88, 713. (Glossary of terms used in developmental and reproductive toxicology (IUPAC Recommendations 2016)) on page 725 [Terms] [Paper]