MD3001 MSA Questions and Correct Answers | Latest Update | A+

what becomes SVC? Ans: anterior cardinal vein what becomes IVC? Ans: right vitelline vein fate of third aortic arch Ans: common and internal carotid fate of fourth aortic arch Ans: left - the aortic arch right - proximal subclavian artery and brachiocephalic trunk timeline of aortic arch development Ans: week 4 - pharyngeal arches develop with pair of arteries from aortic sac - 1 and 2 regress, 3 and 4 large, longitudinal artery forms week 5 - dorsal aorta degenerates superiorly - 7th intersegmental artery grows out into upper limb bud - longitudinal artery extends week 6 - right dorsal aorta degenerates - intersegmental arteries degenerate - 6th aortic arch sends branches to lungs fate of sixth aortic arch Ans: pulmonary artery left - ductus arteriosus fate of longitudinal artery Ans: vertebral arteries fate of 7th intersegmental artery Ans: subclavian artery right - distal subclavian artery which artery does the great cardiac vein follow? Ans: LAD which artery does the middle cardiac vein follow? Ans: posterior I