Embryologic Structures

Question 1

Becomes aortic arch/ R subclavian

Answer 1

4th arch of aortic arch

Question 2

Becomes the internal carotid artery, common carotid

Answer 2

3rd arch of aortic arch

Question 3

Becomes right and left pulmonary arteries and ductus arteriosus

Answer 3

6th arch of aortic arch

Question 4

Becomes the coronary sinus

Answer 4

L Sinus horn

Question 5

Becomes oblique vein

Answer 5

L common cardinal

Question 6

Becomes posterior smooth portion of the RA

Answer 6

R sinus horn

Question 7

Becomes SVC

Answer 7

R common cardinal

Question 8

Becomes IVC

Answer 8

R Vitelline Vein

Question 9

Becomes RAA

Answer 9

Right half of primitive atrium

Question 10

Posterior smooth portion of LA

Answer 10

Proximal parts of pulmonary veins

Question 11

Becomes LAA

Answer 11

Left half of primitive atrium

Question 12

What happens to the left venous valve

Answer 12

fuses with the interatrial septum

Question 13

What happens to the right venous valve (upper)

Answer 13

Forms the crista terminalis

Question 14

What happens to the right venous valve (lower)

Answer 14

Forms the mouths of the IVC and CS

Question 15

RVV tissue makes the

Answer 15

thespian and eustachian valve

Question 16

Bulbus cordis becomes

Answer 16

RV, RVOT and truncus arteriosus

Question 17

Primitive ventricle becomes

Answer 17

LV

Question 18

Primitive atrium becomes

Answer 18

Common atrium

Question 19

Sinus venosus becomes

Answer 19

Right and Left horns

Question 20

Blood flow from the IVC

Answer 20

Eustacian valve, foramen ovale, LA, MV, LV, AO, tissues

Question 21

Blood flow from the SVC

Answer 21

RA, RV, pulmonary trunk, ductus arteriosus, aorta

Question 22

Ductus arteriosus

Answer 22

Ligamentum Arteriosum

Question 23

Foramen ovale

Answer 23

Fossa Ovalis

Question 24

Ductus venosus

Answer 24

Ligamentum Venosum