Aortic arches

Question 1

When do the aortic arches develop?

Answer 1

4th and 5th weeks

Question 2

The aortic sac becomes… (3)

Answer 2

1. portion of ascending aorta
2. brachiocephalic artery, R subclavian, R common carotid
3. most of aortic arch

Question 3

The aortic arches originate from..

Answer 3

the aortic sac

Question 4

The aortic arches terminate where?

Answer 4

Dorsal aortae; they fuse caudal to pharyngeal arches to form a single dorsal aorta

Question 5

Arch 1

Answer 5

Maxillary artery, most of arch regresses

Question 6

Arch 2

Answer 6

Hyoid and stapedial arteries, most of arch regresses

Question 7

Arch 3

Answer 7

Proximal region: common carotid a

Distal region: internal carotid a

Question 8

Arch 4

Answer 8

Right side – proximal: R subclavian a

Left side – portion of aortic arch

Question 9

Arch 5

Answer 9

no derivatives

Question 10

Arch 6

Answer 10

Right side – Proximal: portion of R. pulmonary a
Left side – Proximal: portion of L pulmonary a
Distal: ductus arteriosus

Question 11

Ascending aorta

Answer 11

truncus arteriosus

aortic sac

Question 12

Arch of aorta

Answer 12

aortic sac

L 4th aortic arch

Question 13

Descending aorta

Answer 13

dorsal aorta