Embryology of Heat + Great Vessels

Question 1

primary heart field

Answer 1

visceral mesoderm

cranial yo developing neural tube

Question 2

what type of folding is involved in the heart reaching its final position

Answer 2

lateral folding

cranio caudal folding

Question 3

how many dilations does the heart develop

Answer 3

5

Question 4

trancus arterious

Answer 4

aorta

pulmonary trunk

Question 5

bulbus cordis

Answer 5

trabeculated part of RV

outflow part of both ventricles

Question 6

ventricle

Answer 6

trabeculated part of LV

Question 7

atrium

Answer 7

trabeculated part of both atria

Question 8

sinus venous

Answer 8

smooth part RA

cornoary sinus

Question 9

what happens at day 23

Answer 9

heart beings to loop and fold

Question 10

explain development of aortic arches

Answer 10

6 pairs = associated with pharyngeal arches

Question 11

1 and 2 aortic arch

Answer 11

most obliterated

Question 12

5 aortic arch

Answer 12

rudimentary or absent

Question 13

3 aortic arch

Answer 13

common carotid aa

1st part of ICA

Question 14

4 aortic arch

Answer 14

right subclavian a - part of aortic arch

Question 15

6 aortic arch

Answer 15

srpout branches = form pulmonary aa ductus arteriosus on left

Question 16

venous system development

Answer 16

1. Vitelline veins - drain yolk sac
   - portal venous system draining gut
   - hepatic sinusoids + veins
   - hepatic portion of IVC
2. Umbilical veins - O2 blood from placenta
   - right degenerates - left remains as definitive umbilical vein
3. Cardinal veins - give systemic venous system

Question 17

anterior cardinal veins

Answer 17

drain head + neck
jugular system + left brachiocephalic vein
-SVC

Question 18

posterior cardinal veins

Answer 18

drain trunk
azygous + hemiazygous systems
gonadal + renal veins
iliac veins
IVC