Embryology - Aortic Arches Flashcards
what is vasculogenesis?
new formation of a primitive vascular network
what are the first arteries to appear in the embryo?
right and left primitive aortae
each primitive aorta has a ____ part and a ____ part
ventral, dorsal
the two _____ aortae partially fuse to form the aortic sac
ventral
where do the aortic branches arise from?
aortic sac
how many pharyngeal arches form?
3
what do the 1st and 2nd aortic arches become?
maxillary arteries
what does the 3rd aortic arch become?
common carotid and first part of internal carotid arteries
what is the 3rd aortic arch also known as?
carotid arch
what does the 4th right aortic arch become?
proximal portion of right subclavian artery
what does the 4th left aortic arch become?
distal part of aortic arch
which arch never comes to anything?
5th
what becomes of the proximal part of the 6th right aortic arch?
proximal part of the right pulmonary artery
what becomes of the 6th left aortic arch?
left pulmonary artery, ductus arteriosus, later the ligamentum arteriosum
which arch forms the distal part of the aortic arch?
4th left
